122392991 has 16 divisors (see below), whose sum is σ = 145195008. Its totient is φ = 100958400.

The previous prime is 122392973. The next prime is 122392993. The reversal of 122392991 is 199293221.

It is a cyclic number.

It is not a de Polignac number, because 122392991 - 2²² = 118198687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122392993) 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, 39971 + ... + 42923.

It is an arithmetic number, because the mean of its divisors is an integer number (9074688).

Almost surely, 2^122392991 is an apocalyptic number.

122392991 is a deficient number, since it is larger than the sum of its proper divisors (22802017).

122392991 is a wasteful number, since it uses less digits than its factorization.

122392991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182.

The product of its digits is 17496, while the sum is 38.

The square root of 122392991 is about 11063.1365805544. The cubic root of 122392991 is about 496.4995387311.

The spelling of 122392991 in words is "one hundred twenty-two million, three hundred ninety-two thousand, nine hundred ninety-one".