247081090 has 8 divisors (see below), whose sum is σ = 444745980. Its totient is φ = 98832432.

The previous prime is 247081069. The next prime is 247081097. The reversal of 247081090 is 90180742.

It can be written as a sum of positive squares in 2 ways, for example, as 239413729 + 7667361 = 15473^2 + 2769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×247081090² = 122098130071176200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247081097) 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, 12354045 + ... + 12354064.

Almost surely, 2^247081090 is an apocalyptic number.

247081090 is a deficient number, since it is larger than the sum of its proper divisors (197664890).

247081090 is a wasteful number, since it uses less digits than its factorization.

247081090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24708116.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 247081090 is about 15718.8132503698. The cubic root of 247081090 is about 627.4991899589.

The spelling of 247081090 in words is "two hundred forty-seven million, eighty-one thousand, ninety".