139022969 has 4 divisors (see below), whose sum is σ = 139046820. Its totient is φ = 138999120.

The previous prime is 139022927. The next prime is 139022977. The reversal of 139022969 is 969220931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 73736569 + 65286400 = 8587^2 + 8080^2 .

It is a cyclic number.

It is not a de Polignac number, because 139022969 - 2⁸ = 139022713 is a prime.

It is a super-2 number, since 2×139022969² = 38654771819149922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139022669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3287 + ... + 16995.

It is an arithmetic number, because the mean of its divisors is an integer number (34761705).

Almost surely, 2^139022969 is an apocalyptic number.

It is an amenable number.

139022969 is a deficient number, since it is larger than the sum of its proper divisors (23851).

139022969 is a wasteful number, since it uses less digits than its factorization.

139022969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23850.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 139022969 is about 11790.8001848899. The cubic root of 139022969 is about 518.0386779605.

The spelling of 139022969 in words is "one hundred thirty-nine million, twenty-two thousand, nine hundred sixty-nine".