1013969520 has 120 divisors (see below), whose sum is σ = 3415067136. Its totient is φ = 269612544.

The previous prime is 1013969519. The next prime is 1013969521. The reversal of 1013969520 is 259693101.

It is an interprime number because it is at equal distance from previous prime (1013969519) and next prime (1013969521).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013969521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273922 + ... + 277598.

Almost surely, 2^1013969520 is an apocalyptic number.

1013969520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1013969520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1707533568).

1013969520 is an abundant number, since it is smaller than the sum of its proper divisors (2401097616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1013969520 is a wasteful number, since it uses less digits than its factorization.

1013969520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079 (or 4070 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 1013969520 is about 31842.8880599735. Note that the first 3 decimals coincide. The cubic root of 1013969520 is about 1004.6349903398.

The spelling of 1013969520 in words is "one billion, thirteen million, nine hundred sixty-nine thousand, five hundred twenty".