249427957 has 2 divisors, whose sum is σ = 249427958. Its totient is φ = 249427956.

The previous prime is 249427943. The next prime is 249428033. The reversal of 249427957 is 759724942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128119761 + 121308196 = 11319^2 + 11014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249427957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249427957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249427357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124713978 + 124713979.

It is an arithmetic number, because the mean of its divisors is an integer number (124713979).

Almost surely, 2^249427957 is an apocalyptic number.

It is an amenable number.

249427957 is a deficient number, since it is larger than the sum of its proper divisors (1).

249427957 is an equidigital number, since it uses as much as digits as its factorization.

249427957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 249427957 is about 15793.2883529682. The cubic root of 249427957 is about 629.4796719912.

The spelling of 249427957 in words is "two hundred forty-nine million, four hundred twenty-seven thousand, nine hundred fifty-seven".