161478279 has 20 divisors (see below), whose sum is σ = 242150040. Its totient is φ = 107237520.

The previous prime is 161478277. The next prime is 161478281. The reversal of 161478279 is 972874161.

It is a happy number.

161478279 is a `hidden beast` number, since 1 + 614 + 7 + 8 + 27 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (161478277) and next prime (161478281).

It is not a de Polignac number, because 161478279 - 2¹ = 161478277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161478277) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18084 + ... + 25494.

It is an arithmetic number, because the mean of its divisors is an integer number (12107502).

Almost surely, 2^161478279 is an apocalyptic number.

161478279 is a deficient number, since it is larger than the sum of its proper divisors (80671761).

161478279 is an equidigital number, since it uses as much as digits as its factorization.

161478279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7692 (or 7683 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 161478279 is about 12707.4103970872. The cubic root of 161478279 is about 544.5503448202.

The spelling of 161478279 in words is "one hundred sixty-one million, four hundred seventy-eight thousand, two hundred seventy-nine".