161974607 has 4 divisors (see below), whose sum is σ = 163547280. Its totient is φ = 160401936.

The previous prime is 161974591. The next prime is 161974619. The reversal of 161974607 is 706479161.

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 161974607 - 2⁴ = 161974591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161974207) 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, 786182 + ... + 786387.

It is an arithmetic number, because the mean of its divisors is an integer number (40886820).

Almost surely, 2^161974607 is an apocalyptic number.

161974607 is a deficient number, since it is larger than the sum of its proper divisors (1572673).

161974607 is a wasteful number, since it uses less digits than its factorization.

161974607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572672.

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

The square root of 161974607 is about 12726.9244910151. The cubic root of 161974607 is about 545.1076935569.

The spelling of 161974607 in words is "one hundred sixty-one million, nine hundred seventy-four thousand, six hundred seven".