68364891 has 28 divisors (see below), whose sum is σ = 117152112. Its totient is φ = 39062736.

The previous prime is 68364853. The next prime is 68364949. The reversal of 68364891 is 19846386.

It is not a de Polignac number, because 68364891 - 2¹⁴ = 68348507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68364091) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1596 + ... + 11801.

It is an arithmetic number, because the mean of its divisors is an integer number (4184004).

Almost surely, 2^68364891 is an apocalyptic number.

68364891 is a deficient number, since it is larger than the sum of its proper divisors (48787221).

68364891 is an equidigital number, since it uses as much as digits as its factorization.

68364891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13422 (or 13407 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 68364891 is about 8268.3064166732. The cubic root of 68364891 is about 408.8942862389.

The spelling of 68364891 in words is "sixty-eight million, three hundred sixty-four thousand, eight hundred ninety-one".