167377961 has 4 divisors (see below), whose sum is σ = 170121924. Its totient is φ = 164634000.

The previous prime is 167377927. The next prime is 167377963. The reversal of 167377961 is 169773761.

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 14707225 + 152670736 = 3835^2 + 12356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167377961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (167377963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371890 + ... + 1372011.

It is an arithmetic number, because the mean of its divisors is an integer number (42530481).

Almost surely, 2^167377961 is an apocalyptic number.

It is an amenable number.

167377961 is a deficient number, since it is larger than the sum of its proper divisors (2743963).

167377961 is an equidigital number, since it uses as much as digits as its factorization.

167377961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743962.

The product of its digits is 333396, while the sum is 47.

The square root of 167377961 is about 12937.4634685475. The cubic root of 167377961 is about 551.1029777787.

The spelling of 167377961 in words is "one hundred sixty-seven million, three hundred seventy-seven thousand, nine hundred sixty-one".