123240947 has 2 divisors, whose sum is σ = 123240948. Its totient is φ = 123240946.

The previous prime is 123240937. The next prime is 123240961. The reversal of 123240947 is 749042321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123240947 - 2⁶ = 123240883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123240937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61620473 + 61620474.

It is an arithmetic number, because the mean of its divisors is an integer number (61620474).

Almost surely, 2^123240947 is an apocalyptic number.

123240947 is a deficient number, since it is larger than the sum of its proper divisors (1).

123240947 is an equidigital number, since it uses as much as digits as its factorization.

123240947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 123240947 is about 11101.3939214857. The cubic root of 123240947 is about 497.6435073323.

The spelling of 123240947 in words is "one hundred twenty-three million, two hundred forty thousand, nine hundred forty-seven".