67731994 has 16 divisors (see below), whose sum is σ = 114657120. Its totient is φ = 29725360.

The previous prime is 67731991. The next prime is 67731997. The reversal of 67731994 is 49913776.

It is an interprime number because it is at equal distance from previous prime (67731991) and next prime (67731997).

It is a super-2 number, since 2×67731994² = 9175246022432072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67731991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52444 + ... + 53719.

It is an arithmetic number, because the mean of its divisors is an integer number (7166070).

Almost surely, 2^67731994 is an apocalyptic number.

67731994 is a deficient number, since it is larger than the sum of its proper divisors (46925126).

67731994 is a wasteful number, since it uses less digits than its factorization.

67731994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106205.

The product of its digits is 285768, while the sum is 46.

The square root of 67731994 is about 8229.9449572886. The cubic root of 67731994 is about 407.6285747313.

The spelling of 67731994 in words is "sixty-seven million, seven hundred thirty-one thousand, nine hundred ninety-four".