249608407 has 2 divisors, whose sum is σ = 249608408. Its totient is φ = 249608406.

The previous prime is 249608357. The next prime is 249608431. The reversal of 249608407 is 704806942.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249608407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249608407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249608477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124804203 + 124804204.

It is an arithmetic number, because the mean of its divisors is an integer number (124804204).

Almost surely, 2^249608407 is an apocalyptic number.

249608407 is a deficient number, since it is larger than the sum of its proper divisors (1).

249608407 is an equidigital number, since it uses as much as digits as its factorization.

249608407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 249608407 is about 15799.0001898854. Note that the first 3 decimals coincide. The cubic root of 249608407 is about 629.6314355530.

The spelling of 249608407 in words is "two hundred forty-nine million, six hundred eight thousand, four hundred seven".