122739690 has 16 divisors (see below), whose sum is σ = 294575328. Its totient is φ = 32730576.

The previous prime is 122739671. The next prime is 122739697. The reversal of 122739690 is 96937221.

It is a super-2 number, since 2×122739690² = 30130063002592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122739697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045632 + ... + 2045691.

It is an arithmetic number, because the mean of its divisors is an integer number (18410958).

Almost surely, 2^122739690 is an apocalyptic number.

122739690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122739690 is an abundant number, since it is smaller than the sum of its proper divisors (171835638).

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

122739690 is a wasteful number, since it uses less digits than its factorization.

122739690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091333.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 122739690 is about 11078.7946095232. The cubic root of 122739690 is about 496.9679032802.

The spelling of 122739690 in words is "one hundred twenty-two million, seven hundred thirty-nine thousand, six hundred ninety".