249620473 has 4 divisors (see below), whose sum is σ = 250887780. Its totient is φ = 248353168.

The previous prime is 249620453. The next prime is 249620477. The reversal of 249620473 is 374026942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186131449 + 63489024 = 13643^2 + 7968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249620473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249620477) 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, 633358 + ... + 633751.

It is an arithmetic number, because the mean of its divisors is an integer number (62721945).

Almost surely, 2^249620473 is an apocalyptic number.

It is an amenable number.

249620473 is a deficient number, since it is larger than the sum of its proper divisors (1267307).

249620473 is a wasteful number, since it uses less digits than its factorization.

249620473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267306.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 249620473 is about 15799.3820448776. The cubic root of 249620473 is about 629.6415807915.

The spelling of 249620473 in words is "two hundred forty-nine million, six hundred twenty thousand, four hundred seventy-three".