1239560997 has 4 divisors (see below), whose sum is σ = 1652748000. Its totient is φ = 826373996.

The previous prime is 1239560989. The next prime is 1239561073. The reversal of 1239560997 is 7990659321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1239560997 - 2³ = 1239560989 is a prime.

It is a super-2 number, since 2×1239560997² = 3073022930567268018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239560977) 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, 206593497 + ... + 206593502.

It is an arithmetic number, because the mean of its divisors is an integer number (413187000).

Almost surely, 2^1239560997 is an apocalyptic number.

It is an amenable number.

1239560997 is a deficient number, since it is larger than the sum of its proper divisors (413187003).

1239560997 is an equidigital number, since it uses as much as digits as its factorization.

1239560997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413187002.

The product of its (nonzero) digits is 918540, while the sum is 51.

The square root of 1239560997 is about 35207.3997477803. The cubic root of 1239560997 is about 1074.2102718312.

The spelling of 1239560997 in words is "one billion, two hundred thirty-nine million, five hundred sixty thousand, nine hundred ninety-seven".