11958857 has 2 divisors, whose sum is σ = 11958858. Its totient is φ = 11958856.

The previous prime is 11958853. The next prime is 11958893. The reversal of 11958857 is 75885911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10916416 + 1042441 = 3304^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 11958857 - 2² = 11958853 is a prime.

It is not a weakly prime, because it can be changed into another prime (11958853) 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 as a sum of consecutive naturals, namely, 5979428 + 5979429.

It is an arithmetic number, because the mean of its divisors is an integer number (5979429).

Almost surely, 2^11958857 is an apocalyptic number.

It is an amenable number.

11958857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11958857 is an equidigital number, since it uses as much as digits as its factorization.

11958857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 44.

The square root of 11958857 is about 3458.1580357179. The cubic root of 11958857 is about 228.6808990321.

The spelling of 11958857 in words is "eleven million, nine hundred fifty-eight thousand, eight hundred fifty-seven".