161273079 has 32 divisors (see below), whose sum is σ = 271987200. Its totient is φ = 93487680.

The previous prime is 161273071. The next prime is 161273107. The reversal of 161273079 is 970372161.

It is a happy number.

161273079 is a `hidden beast` number, since 1 + 612 + 7 + 30 + 7 + 9 = 666.

It is not a de Polignac number, because 161273079 - 2³ = 161273071 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161273071) 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 31 ways as a sum of consecutive naturals, for example, 4974 + ... + 18635.

It is an arithmetic number, because the mean of its divisors is an integer number (8499600).

Almost surely, 2^161273079 is an apocalyptic number.

161273079 is a deficient number, since it is larger than the sum of its proper divisors (110714121).

161273079 is a wasteful number, since it uses less digits than its factorization.

161273079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23652 (or 23646 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 161273079 is about 12699.3338014244. Note that the first 3 decimals coincide. The cubic root of 161273079 is about 544.3195829345.

It can be divided in two parts, 1612 and 73079, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 161273079 in words is "one hundred sixty-one million, two hundred seventy-three thousand, seventy-nine".