61173609 has 12 divisors (see below), whose sum is σ = 94881744. Its totient is φ = 34956264.

The previous prime is 61173587. The next prime is 61173611. The reversal of 61173609 is 90637116.

It is not a de Polignac number, because 61173609 - 2⁵ = 61173577 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61173609.

It is not an unprimeable number, because it can be changed into a prime (61173689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207927 + ... + 208220.

It is an arithmetic number, because the mean of its divisors is an integer number (7906812).

Almost surely, 2^61173609 is an apocalyptic number.

It is an amenable number.

61173609 is a deficient number, since it is larger than the sum of its proper divisors (33708135).

61173609 is a wasteful number, since it uses less digits than its factorization.

61173609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416164 (or 416157 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 61173609 is about 7821.3559566101. The cubic root of 61173609 is about 394.0228134041.

The spelling of 61173609 in words is "sixty-one million, one hundred seventy-three thousand, six hundred nine".