249376947 has 4 divisors (see below), whose sum is σ = 332502600. Its totient is φ = 166251296.

The previous prime is 249376943. The next prime is 249376949. The reversal of 249376947 is 749673942.

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

It is a cyclic number.

It is not a de Polignac number, because 249376947 - 2² = 249376943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249376947.

It is not an unprimeable number, because it can be changed into a prime (249376943) 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, 41562822 + ... + 41562827.

It is an arithmetic number, because the mean of its divisors is an integer number (83125650).

Almost surely, 2^249376947 is an apocalyptic number.

249376947 is a deficient number, since it is larger than the sum of its proper divisors (83125653).

249376947 is an equidigital number, since it uses as much as digits as its factorization.

249376947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83125652.

The product of its digits is 2286144, while the sum is 51.

The square root of 249376947 is about 15791.6733438860. The cubic root of 249376947 is about 629.4367578667.

The spelling of 249376947 in words is "two hundred forty-nine million, three hundred seventy-six thousand, nine hundred forty-seven".