608626391 has 4 divisors (see below), whose sum is σ = 635088432. Its totient is φ = 582164352.

The previous prime is 608626363. The next prime is 608626397. The reversal of 608626391 is 193626806.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 608626391 - 2⁶ = 608626327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (608626397) 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, 13230986 + ... + 13231031.

It is an arithmetic number, because the mean of its divisors is an integer number (158772108).

Almost surely, 2^608626391 is an apocalyptic number.

608626391 is a deficient number, since it is larger than the sum of its proper divisors (26462041).

608626391 is a wasteful number, since it uses less digits than its factorization.

608626391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26462040.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 608626391 is about 24670.3544968450. The cubic root of 608626391 is about 847.4555470168.

The spelling of 608626391 in words is "six hundred eight million, six hundred twenty-six thousand, three hundred ninety-one".