249628821907 has 2 divisors, whose sum is σ = 249628821908. Its totient is φ = 249628821906.

The previous prime is 249628821857. The next prime is 249628821941. The reversal of 249628821907 is 709128826942.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249628821907 - 2²³ = 249620433299 is a prime.

It is not a weakly prime, because it can be changed into another prime (249628821307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124814410953 + 124814410954.

It is an arithmetic number, because the mean of its divisors is an integer number (124814410954).

Almost surely, 2^249628821907 is an apocalyptic number.

249628821907 is a deficient number, since it is larger than the sum of its proper divisors (1).

249628821907 is an equidigital number, since it uses as much as digits as its factorization.

249628821907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 249628821907 in words is "two hundred forty-nine billion, six hundred twenty-eight million, eight hundred twenty-one thousand, nine hundred seven".