167881601 has 4 divisors (see below), whose sum is σ = 168550704. Its totient is φ = 167212500.

The previous prime is 167881591. The next prime is 167881621. The reversal of 167881601 is 106188761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167881601 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 (167881621) 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, 334175 + ... + 334676.

It is an arithmetic number, because the mean of its divisors is an integer number (42137676).

Almost surely, 2^167881601 is an apocalyptic number.

It is an amenable number.

167881601 is a deficient number, since it is larger than the sum of its proper divisors (669103).

167881601 is an equidigital number, since it uses as much as digits as its factorization.

167881601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669102.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 167881601 is about 12956.9132512339. The cubic root of 167881601 is about 551.6551802640.

The spelling of 167881601 in words is "one hundred sixty-seven million, eight hundred eighty-one thousand, six hundred one".