202639013 has 2 divisors, whose sum is σ = 202639014. Its totient is φ = 202639012.

The previous prime is 202639001. The next prime is 202639049. The reversal of 202639013 is 310936202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181090849 + 21548164 = 13457^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 202639013 - 2¹⁸ = 202376869 is a prime.

It is a super-2 number, since 2×202639013² = 82125139179228338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202609013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101319506 + 101319507.

It is an arithmetic number, because the mean of its divisors is an integer number (101319507).

Almost surely, 2^202639013 is an apocalyptic number.

It is an amenable number.

202639013 is a deficient number, since it is larger than the sum of its proper divisors (1).

202639013 is an equidigital number, since it uses as much as digits as its factorization.

202639013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 202639013 is about 14235.1330517140. The cubic root of 202639013 is about 587.3644901286.

The spelling of 202639013 in words is "two hundred two million, six hundred thirty-nine thousand, thirteen".