67089731 has 4 divisors (see below), whose sum is σ = 69403200. Its totient is φ = 64776264.

The previous prime is 67089721. The next prime is 67089733. The reversal of 67089731 is 13798076.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67089731 is a prime.

It is a super-2 number, since 2×67089731² = 9002064011304722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67089733) 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, 1156691 + ... + 1156748.

It is an arithmetic number, because the mean of its divisors is an integer number (17350800).

Almost surely, 2^67089731 is an apocalyptic number.

67089731 is a deficient number, since it is larger than the sum of its proper divisors (2313469).

67089731 is a wasteful number, since it uses less digits than its factorization.

67089731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313468.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 67089731 is about 8190.8321311085. The cubic root of 67089731 is about 406.3360459631.

The spelling of 67089731 in words is "sixty-seven million, eighty-nine thousand, seven hundred thirty-one".