1369764981 has 24 divisors (see below), whose sum is σ = 2139280416. Its totient is φ = 839556000.

The previous prime is 1369764973. The next prime is 1369764983. The reversal of 1369764981 is 1894679631.

It is not a de Polignac number, because 1369764981 - 2³ = 1369764973 is a prime.

It is a super-2 number, since 2×1369764981² = 3752512206347860722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369764983) 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, 6046 + ... + 52688.

It is an arithmetic number, because the mean of its divisors is an integer number (89136684).

Almost surely, 2^1369764981 is an apocalyptic number.

It is an amenable number.

1369764981 is a deficient number, since it is larger than the sum of its proper divisors (769515435).

1369764981 is a wasteful number, since it uses less digits than its factorization.

1369764981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46913 (or 46910 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1369764981 is about 37010.3361373549. The cubic root of 1369764981 is about 1110.5770289325.

The spelling of 1369764981 in words is "one billion, three hundred sixty-nine million, seven hundred sixty-four thousand, nine hundred eighty-one".