61167279 has 4 divisors (see below), whose sum is σ = 81556376. Its totient is φ = 40778184.

The previous prime is 61167269. The next prime is 61167283. The reversal of 61167279 is 97276116.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61167279 - 2⁴ = 61167263 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 (61167209) 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, 10194544 + ... + 10194549.

It is an arithmetic number, because the mean of its divisors is an integer number (20389094).

Almost surely, 2^61167279 is an apocalyptic number.

61167279 is a deficient number, since it is larger than the sum of its proper divisors (20389097).

61167279 is a wasteful number, since it uses less digits than its factorization.

61167279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20389096.

The product of its digits is 31752, while the sum is 39.

The square root of 61167279 is about 7820.9512848502. The cubic root of 61167279 is about 394.0092223012.

The spelling of 61167279 in words is "sixty-one million, one hundred sixty-seven thousand, two hundred seventy-nine".