68503391 has 12 divisors (see below), whose sum is σ = 76822200. Its totient is φ = 60579360.

The previous prime is 68503381. The next prime is 68503399. The reversal of 68503391 is 19330586.

It is not a de Polignac number, because 68503391 - 2⁶ = 68503327 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 (68503399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12785 + ... + 17333.

It is an arithmetic number, because the mean of its divisors is an integer number (6401850).

Almost surely, 2^68503391 is an apocalyptic number.

68503391 is a deficient number, since it is larger than the sum of its proper divisors (8318809).

68503391 is a wasteful number, since it uses less digits than its factorization.

68503391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634 (or 4597 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 68503391 is about 8276.6775338900. The cubic root of 68503391 is about 409.1702254304.

The spelling of 68503391 in words is "sixty-eight million, five hundred three thousand, three hundred ninety-one".