1369972891 has 16 divisors (see below), whose sum is σ = 1594378240. Its totient is φ = 1152908640.

The previous prime is 1369972871. The next prime is 1369972907. The reversal of 1369972891 is 1982799631.

It is a cyclic number.

It is not a de Polignac number, because 1369972891 - 2⁵ = 1369972859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1369972871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93250 + ... + 106936.

It is an arithmetic number, because the mean of its divisors is an integer number (99648640).

Almost surely, 2^1369972891 is an apocalyptic number.

1369972891 is a deficient number, since it is larger than the sum of its proper divisors (224405349).

1369972891 is a wasteful number, since it uses less digits than its factorization.

1369972891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13954.

The product of its digits is 1469664, while the sum is 55.

The square root of 1369972891 is about 37013.1448407184. The cubic root of 1369972891 is about 1110.6332157947.

The spelling of 1369972891 in words is "one billion, three hundred sixty-nine million, nine hundred seventy-two thousand, eight hundred ninety-one".