67631489 has 4 divisors (see below), whose sum is σ = 67875924. Its totient is φ = 67387056.

The previous prime is 67631483. The next prime is 67631513. The reversal of 67631489 is 98413676.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46471489 + 21160000 = 6817^2 + 4600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67631489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67631483) 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, 121802 + ... + 122355.

It is an arithmetic number, because the mean of its divisors is an integer number (16968981).

Almost surely, 2^67631489 is an apocalyptic number.

It is an amenable number.

67631489 is a deficient number, since it is larger than the sum of its proper divisors (244435).

67631489 is a wasteful number, since it uses less digits than its factorization.

67631489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244434.

The product of its digits is 217728, while the sum is 44.

The square root of 67631489 is about 8223.8366350506. The cubic root of 67631489 is about 407.4268532690.

The spelling of 67631489 in words is "sixty-seven million, six hundred thirty-one thousand, four hundred eighty-nine".