247372493 has 2 divisors, whose sum is σ = 247372494. Its totient is φ = 247372492.

The previous prime is 247372471. The next prime is 247372501. The reversal of 247372493 is 394273742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247055524 + 316969 = 15718^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 247372493 - 2¹² = 247368397 is a prime.

It is a super-2 number, since 2×247372493² = 122386300586070098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247372493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247372793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123686246 + 123686247.

It is an arithmetic number, because the mean of its divisors is an integer number (123686247).

Almost surely, 2^247372493 is an apocalyptic number.

It is an amenable number.

247372493 is a deficient number, since it is larger than the sum of its proper divisors (1).

247372493 is an equidigital number, since it uses as much as digits as its factorization.

247372493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 41.

The square root of 247372493 is about 15728.0797620053. The cubic root of 247372493 is about 627.7457801346.

The spelling of 247372493 in words is "two hundred forty-seven million, three hundred seventy-two thousand, four hundred ninety-three".