1969918965 has 24 divisors (see below), whose sum is σ = 3902316288. Its totient is φ = 900534240.

The previous prime is 1969918949. The next prime is 1969918997. The reversal of 1969918965 is 5698199691.

It is a happy number.

It is not a de Polignac number, because 1969918965 - 2⁴ = 1969918949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3126541 + ... + 3127170.

It is an arithmetic number, because the mean of its divisors is an integer number (162596512).

Almost surely, 2^1969918965 is an apocalyptic number.

1969918965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1969918965 is a deficient number, since it is larger than the sum of its proper divisors (1932397323).

1969918965 is a wasteful number, since it uses less digits than its factorization.

1969918965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253729 (or 6253726 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 63.

The square root of 1969918965 is about 44383.7691617105. The cubic root of 1969918965 is about 1253.5724926435.

The spelling of 1969918965 in words is "one billion, nine hundred sixty-nine million, nine hundred eighteen thousand, nine hundred sixty-five".