247949993 has 2 divisors, whose sum is σ = 247949994. Its totient is φ = 247949992.

The previous prime is 247949983. The next prime is 247950011. The reversal of 247949993 is 399949742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240622144 + 7327849 = 15512^2 + 2707^2 .

It is a cyclic number.

It is not a de Polignac number, because 247949993 - 2¹⁶ = 247884457 is a prime.

It is a super-2 number, since 2×247949993² = 122958398057400098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247949983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123974996 + 123974997.

It is an arithmetic number, because the mean of its divisors is an integer number (123974997).

Almost surely, 2^247949993 is an apocalyptic number.

It is an amenable number.

247949993 is a deficient number, since it is larger than the sum of its proper divisors (1).

247949993 is an equidigital number, since it uses as much as digits as its factorization.

247949993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 56.

The square root of 247949993 is about 15746.4279441402. The cubic root of 247949993 is about 628.2338988702.

The spelling of 247949993 in words is "two hundred forty-seven million, nine hundred forty-nine thousand, nine hundred ninety-three".