161171907 has 16 divisors (see below), whose sum is σ = 231657888. Its totient is φ = 99083520.

The previous prime is 161171903. The next prime is 161171911. The reversal of 161171907 is 709171161.

It is a happy number.

161171907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161171903) and next prime (161171911).

It is not a de Polignac number, because 161171907 - 2² = 161171903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161171903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64807 + ... + 67247.

It is an arithmetic number, because the mean of its divisors is an integer number (14478618).

Almost surely, 2^161171907 is an apocalyptic number.

161171907 is a deficient number, since it is larger than the sum of its proper divisors (70485981).

161171907 is a wasteful number, since it uses less digits than its factorization.

161171907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4150.

The product of its (nonzero) digits is 2646, while the sum is 33.

The square root of 161171907 is about 12695.3498179452. The cubic root of 161171907 is about 544.2057358272.

The spelling of 161171907 in words is "one hundred sixty-one million, one hundred seventy-one thousand, nine hundred seven".