247774945 has 16 divisors (see below), whose sum is σ = 324751680. Its totient is φ = 179982400.

The previous prime is 247774937. The next prime is 247774951. The reversal of 247774945 is 549477742.

It is not a de Polignac number, because 247774945 - 2³ = 247774937 is a prime.

It is a super-2 number, since 2×247774945² = 122784846739506050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53835 + ... + 58255.

It is an arithmetic number, because the mean of its divisors is an integer number (20296980).

Almost surely, 2^247774945 is an apocalyptic number.

It is an amenable number.

247774945 is a deficient number, since it is larger than the sum of its proper divisors (76976735).

247774945 is a wasteful number, since it uses less digits than its factorization.

247774945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456.

The product of its digits is 1975680, while the sum is 49.

The square root of 247774945 is about 15740.8686227921. The cubic root of 247774945 is about 628.0860236535.

The spelling of 247774945 in words is "two hundred forty-seven million, seven hundred seventy-four thousand, nine hundred forty-five".