67345631 has 4 divisors (see below), whose sum is σ = 67425072. Its totient is φ = 67266192.

The previous prime is 67345567. The next prime is 67345637. The reversal of 67345631 is 13654376.

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 67345631 - 2⁶ = 67345567 is a prime.

It is a super-2 number, since 2×67345631² = 9070868029576322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67345591 and 67345600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67345637) 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, 38435 + ... + 40148.

It is an arithmetic number, because the mean of its divisors is an integer number (16856268).

Almost surely, 2^67345631 is an apocalyptic number.

67345631 is a deficient number, since it is larger than the sum of its proper divisors (79441).

67345631 is an equidigital number, since it uses as much as digits as its factorization.

67345631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79440.

The product of its digits is 45360, while the sum is 35.

The square root of 67345631 is about 8206.4383870227. The cubic root of 67345631 is about 406.8520189584.

It can be divided in two parts, 67345 and 631, that added together give a palindrome (67976).

The spelling of 67345631 in words is "sixty-seven million, three hundred forty-five thousand, six hundred thirty-one".