122491797 has 4 divisors (see below), whose sum is σ = 163322400. Its totient is φ = 81661196.

The previous prime is 122491777. The next prime is 122491807. The reversal of 122491797 is 797194221.

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 122491797 - 2¹⁰ = 122490773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122491777) 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, 20415297 + ... + 20415302.

It is an arithmetic number, because the mean of its divisors is an integer number (40830600).

Almost surely, 2^122491797 is an apocalyptic number.

It is an amenable number.

122491797 is a deficient number, since it is larger than the sum of its proper divisors (40830603).

122491797 is an equidigital number, since it uses as much as digits as its factorization.

122491797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40830602.

The product of its digits is 63504, while the sum is 42.

The square root of 122491797 is about 11067.6012306190. The cubic root of 122491797 is about 496.6331083032.

The spelling of 122491797 in words is "one hundred twenty-two million, four hundred ninety-one thousand, seven hundred ninety-seven".