122730731 has 2 divisors, whose sum is σ = 122730732. Its totient is φ = 122730730.

The previous prime is 122730703. The next prime is 122730749. The reversal of 122730731 is 137037221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122730731 is a prime.

It is a super-2 number, since 2×122730731² = 30125664663588722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122730731.

It is not a weakly prime, because it can be changed into another prime (122730761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61365365 + 61365366.

It is an arithmetic number, because the mean of its divisors is an integer number (61365366).

Almost surely, 2^122730731 is an apocalyptic number.

122730731 is a deficient number, since it is larger than the sum of its proper divisors (1).

122730731 is an equidigital number, since it uses as much as digits as its factorization.

122730731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 122730731 is about 11078.3902711540. The cubic root of 122730731 is about 496.9558114464.

Adding to 122730731 its reverse (137037221), we get a palindrome (259767952).

The spelling of 122730731 in words is "one hundred twenty-two million, seven hundred thirty thousand, seven hundred thirty-one".