247693990 has 16 divisors (see below), whose sum is σ = 446519952. Its totient is φ = 98928544.

The previous prime is 247693981. The next prime is 247693991. The reversal of 247693990 is 99396742.

It is a super-2 number, since 2×247693990² = 122704625364240200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247693991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11524 + ... + 25063.

It is an arithmetic number, because the mean of its divisors is an integer number (27907497).

Almost surely, 2^247693990 is an apocalyptic number.

247693990 is a deficient number, since it is larger than the sum of its proper divisors (198825962).

247693990 is a wasteful number, since it uses less digits than its factorization.

247693990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37271.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 247693990 is about 15738.2969218401. The cubic root of 247693990 is about 628.0176117824.

The spelling of 247693990 in words is "two hundred forty-seven million, six hundred ninety-three thousand, nine hundred ninety".