122731897 has 4 divisors (see below), whose sum is σ = 122775796. Its totient is φ = 122688000.

The previous prime is 122731879. The next prime is 122731919. The reversal of 122731897 is 798137221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88906041 + 33825856 = 9429^2 + 5816^2 .

It is a cyclic number.

It is not a de Polignac number, because 122731897 - 2⁷ = 122731769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122738897) 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, 17448 + ... + 23449.

It is an arithmetic number, because the mean of its divisors is an integer number (30693949).

Almost surely, 2^122731897 is an apocalyptic number.

It is an amenable number.

122731897 is a deficient number, since it is larger than the sum of its proper divisors (43899).

122731897 is an equidigital number, since it uses as much as digits as its factorization.

122731897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43898.

The product of its digits is 42336, while the sum is 40.

The square root of 122731897 is about 11078.4428960030. The cubic root of 122731897 is about 496.9573852132.

It can be divided in two parts, 1227 and 31897, that added together give a square (33124 = 182²).

The spelling of 122731897 in words is "one hundred twenty-two million, seven hundred thirty-one thousand, eight hundred ninety-seven".