122783957 has 4 divisors (see below), whose sum is σ = 123293676. Its totient is φ = 122274240.

The previous prime is 122783939. The next prime is 122783977. The reversal of 122783957 is 759387221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 759387221 = 8233 ⋅92237.

It can be written as a sum of positive squares in 2 ways, for example, as 69872881 + 52911076 = 8359^2 + 7274^2 .

It is a cyclic number.

It is not a de Polignac number, because 122783957 - 2¹⁴ = 122767573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122783977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254498 + ... + 254979.

It is an arithmetic number, because the mean of its divisors is an integer number (30823419).

Almost surely, 2^122783957 is an apocalyptic number.

It is an amenable number.

122783957 is a deficient number, since it is larger than the sum of its proper divisors (509719).

122783957 is an equidigital number, since it uses as much as digits as its factorization.

122783957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509718.

The product of its digits is 211680, while the sum is 44.

The square root of 122783957 is about 11080.7922550691. The cubic root of 122783957 is about 497.0276411801.

It can be divided in two parts, 1227 and 83957, that added together give a cube (85184 = 44³).

The spelling of 122783957 in words is "one hundred twenty-two million, seven hundred eighty-three thousand, nine hundred fifty-seven".