247390913 has 12 divisors (see below), whose sum is σ = 310773120. Its totient is φ = 192771480.

The previous prime is 247390903. The next prime is 247390931. The reversal of 247390913 is 319093742.

It is not a de Polignac number, because 247390913 - 2¹⁴ = 247374529 is a prime.

It is a super-2 number, since 2×247390913² = 122404527669947138, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (247390903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145193 + ... + 146886.

It is an arithmetic number, because the mean of its divisors is an integer number (25897760).

Almost surely, 2^247390913 is an apocalyptic number.

It is an amenable number.

247390913 is a deficient number, since it is larger than the sum of its proper divisors (63382207).

247390913 is a wasteful number, since it uses less digits than its factorization.

247390913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292108 (or 292097 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 247390913 is about 15728.6653279927. The cubic root of 247390913 is about 627.7613609430.

It can be divided in two parts, 24 and 7390913, that added together give a palindrome (7390937).

The spelling of 247390913 in words is "two hundred forty-seven million, three hundred ninety thousand, nine hundred thirteen".