122837987 has 4 divisors (see below), whose sum is σ = 124104456. Its totient is φ = 121571520.

The previous prime is 122837959. The next prime is 122837993. The reversal of 122837987 is 789738221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122837987 - 2²⁴ = 106060771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122837947) 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, 633089 + ... + 633282.

It is an arithmetic number, because the mean of its divisors is an integer number (31026114).

Almost surely, 2^122837987 is an apocalyptic number.

122837987 is a deficient number, since it is larger than the sum of its proper divisors (1266469).

122837987 is an equidigital number, since it uses as much as digits as its factorization.

122837987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266468.

The product of its digits is 338688, while the sum is 47.

The square root of 122837987 is about 11083.2299894931. The cubic root of 122837987 is about 497.1005347027.

The spelling of 122837987 in words is "one hundred twenty-two million, eight hundred thirty-seven thousand, nine hundred eighty-seven".