7490639 has 4 divisors (see below), whose sum is σ = 8066856. Its totient is φ = 6914424.

The previous prime is 7490629. The next prime is 7490647. The reversal of 7490639 is 9360947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9360947 = 79 ⋅118493.

It is a cyclic number.

It is not a de Polignac number, because 7490639 - 2²⁰ = 6442063 is a prime.

It is a super-2 number, since 2×7490639² = 112219345256642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7490629) 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, 288089 + ... + 288114.

It is an arithmetic number, because the mean of its divisors is an integer number (2016714).

Almost surely, 2^7490639 is an apocalyptic number.

7490639 is a deficient number, since it is larger than the sum of its proper divisors (576217).

7490639 is a wasteful number, since it uses less digits than its factorization.

7490639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576216.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 7490639 is about 2736.9031769502. The cubic root of 7490639 is about 195.6619102065.

The spelling of 7490639 in words is "seven million, four hundred ninety thousand, six hundred thirty-nine".