122791129 has 4 divisors (see below), whose sum is σ = 129253840. Its totient is φ = 116328420.

The previous prime is 122791127. The next prime is 122791139. The reversal of 122791129 is 921197221.

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 122791129 - 2¹ = 122791127 is a prime.

It is a super-2 number, since 2×122791129² = 30155322722189282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122791094 and 122791103.

It is not an unprimeable number, because it can be changed into a prime (122791121) 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, 3231327 + ... + 3231364.

It is an arithmetic number, because the mean of its divisors is an integer number (32313460).

Almost surely, 2^122791129 is an apocalyptic number.

122791129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

122791129 is a deficient number, since it is larger than the sum of its proper divisors (6462711).

122791129 is an equidigital number, since it uses as much as digits as its factorization.

122791129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6462710.

The product of its digits is 4536, while the sum is 34.

The square root of 122791129 is about 11081.1158734127. The cubic root of 122791129 is about 497.0373183750.

The spelling of 122791129 in words is "one hundred twenty-two million, seven hundred ninety-one thousand, one hundred twenty-nine".