249954157 has 4 divisors (see below), whose sum is σ = 251862336. Its totient is φ = 248045980.

The previous prime is 249954119. The next prime is 249954169. The reversal of 249954157 is 751459942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249954157 - 2²³ = 241565549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249904157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953893 + ... + 954154.

It is an arithmetic number, because the mean of its divisors is an integer number (62965584).

Almost surely, 2^249954157 is an apocalyptic number.

It is an amenable number.

249954157 is a deficient number, since it is larger than the sum of its proper divisors (1908179).

249954157 is a wasteful number, since it uses less digits than its factorization.

249954157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908178.

The product of its digits is 453600, while the sum is 46.

The square root of 249954157 is about 15809.9385514302. The cubic root of 249954157 is about 629.9220168864.

The spelling of 249954157 in words is "two hundred forty-nine million, nine hundred fifty-four thousand, one hundred fifty-seven".