161008951 has 4 divisors (see below), whose sum is σ = 163648504. Its totient is φ = 158369400.

The previous prime is 161008933. The next prime is 161008979. The reversal of 161008951 is 159800161.

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 161008951 - 2⁵ = 161008919 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 (161008931) 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, 1319685 + ... + 1319806.

It is an arithmetic number, because the mean of its divisors is an integer number (40912126).

Almost surely, 2^161008951 is an apocalyptic number.

161008951 is a deficient number, since it is larger than the sum of its proper divisors (2639553).

161008951 is an equidigital number, since it uses as much as digits as its factorization.

161008951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639552.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 161008951 is about 12688.9302543595. The cubic root of 161008951 is about 544.0222640380.

The spelling of 161008951 in words is "one hundred sixty-one million, eight thousand, nine hundred fifty-one".