122997906 has 32 divisors (see below), whose sum is σ = 287716800. Its totient is φ = 38841120.

The previous prime is 122997893. The next prime is 122997913. The reversal of 122997906 is 609799221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58915 + ... + 60966.

It is an arithmetic number, because the mean of its divisors is an integer number (8991150).

Almost surely, 2^122997906 is an apocalyptic number.

122997906 is an abundant number, since it is smaller than the sum of its proper divisors (164718894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122997906 is a wasteful number, since it uses less digits than its factorization.

122997906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119911 (or 119905 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 122997906 is about 11090.4421011969. The cubic root of 122997906 is about 497.3161611267.

The spelling of 122997906 in words is "one hundred twenty-two million, nine hundred ninety-seven thousand, nine hundred six".