249613501 has 2 divisors, whose sum is σ = 249613502. Its totient is φ = 249613500.

The previous prime is 249613487. The next prime is 249613543. The reversal of 249613501 is 105316942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224100900 + 25512601 = 14970^2 + 5051^2 .

It is a cyclic number.

It is not a de Polignac number, because 249613501 - 2⁷ = 249613373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249613571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124806750 + 124806751.

It is an arithmetic number, because the mean of its divisors is an integer number (124806751).

Almost surely, 2^249613501 is an apocalyptic number.

It is an amenable number.

249613501 is a deficient number, since it is larger than the sum of its proper divisors (1).

249613501 is an equidigital number, since it uses as much as digits as its factorization.

249613501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 249613501 is about 15799.1614017960. The cubic root of 249613501 is about 629.6357186896.

The spelling of 249613501 in words is "two hundred forty-nine million, six hundred thirteen thousand, five hundred one".