902639 has 2 divisors, whose sum is σ = 902640. Its totient is φ = 902638.

The previous prime is 902611. The next prime is 902653. The reversal of 902639 is 936209.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 902639 - 2¹² = 898543 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (902659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451319 + 451320.

It is an arithmetic number, because the mean of its divisors is an integer number (451320).

2⁹⁰²⁶³⁹ is an apocalyptic number.

902639 is a deficient number, since it is larger than the sum of its proper divisors (1).

902639 is an equidigital number, since it uses as much as digits as its factorization.

902639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 902639 is about 950.0731550781. The cubic root of 902639 is about 96.6432140225.

The spelling of 902639 in words is "nine hundred two thousand, six hundred thirty-nine".