249297407 has 2 divisors, whose sum is σ = 249297408. Its totient is φ = 249297406.

The previous prime is 249297397. The next prime is 249297431. The reversal of 249297407 is 704792942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249297407 - 2²⁴ = 232520191 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249291407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124648703 + 124648704.

It is an arithmetic number, because the mean of its divisors is an integer number (124648704).

Almost surely, 2^249297407 is an apocalyptic number.

249297407 is a deficient number, since it is larger than the sum of its proper divisors (1).

249297407 is an equidigital number, since it uses as much as digits as its factorization.

249297407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 249297407 is about 15789.1547272170. The cubic root of 249297407 is about 629.3698301038.

It can be divided in two parts, 2492 and 97407, that added together give a palindrome (99899).

The spelling of 249297407 in words is "two hundred forty-nine million, two hundred ninety-seven thousand, four hundred seven".