68946631 has 4 divisors (see below), whose sum is σ = 74250232. Its totient is φ = 63643032.

The previous prime is 68946629. The next prime is 68946643. The reversal of 68946631 is 13664986.

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 68946631 - 2¹ = 68946629 is a prime.

It is a super-2 number, since 2×68946631² = 9507275852500322, 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 (68946671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2651781 + ... + 2651806.

It is an arithmetic number, because the mean of its divisors is an integer number (18562558).

Almost surely, 2^68946631 is an apocalyptic number.

68946631 is a deficient number, since it is larger than the sum of its proper divisors (5303601).

68946631 is a wasteful number, since it uses less digits than its factorization.

68946631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303600.

The product of its digits is 186624, while the sum is 43.

The square root of 68946631 is about 8303.4108052053. The cubic root of 68946631 is about 410.0508186067.

The spelling of 68946631 in words is "sixty-eight million, nine hundred forty-six thousand, six hundred thirty-one".