249362621 has 2 divisors, whose sum is σ = 249362622. Its totient is φ = 249362620.

The previous prime is 249362611. The next prime is 249362623. The reversal of 249362621 is 126263942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235776025 + 13586596 = 15355^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 249362621 - 2⁶ = 249362557 is a prime.

Together with 249362623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249362623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124681310 + 124681311.

It is an arithmetic number, because the mean of its divisors is an integer number (124681311).

Almost surely, 2^249362621 is an apocalyptic number.

It is an amenable number.

249362621 is a deficient number, since it is larger than the sum of its proper divisors (1).

249362621 is an equidigital number, since it uses as much as digits as its factorization.

249362621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 249362621 is about 15791.2197438957. The cubic root of 249362621 is about 629.4247045156.

The spelling of 249362621 in words is "two hundred forty-nine million, three hundred sixty-two thousand, six hundred twenty-one".