61112279 has 4 divisors (see below), whose sum is σ = 61144680. Its totient is φ = 61079880.

The previous prime is 61112243. The next prime is 61112291. The reversal of 61112279 is 97221116.

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 61112279 - 2¹⁶ = 61046743 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 (61112239) 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, 13184 + ... + 17205.

It is an arithmetic number, because the mean of its divisors is an integer number (15286170).

Almost surely, 2^61112279 is an apocalyptic number.

61112279 is a deficient number, since it is larger than the sum of its proper divisors (32401).

61112279 is a wasteful number, since it uses less digits than its factorization.

61112279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32400.

The product of its digits is 1512, while the sum is 29.

The square root of 61112279 is about 7817.4342977732. The cubic root of 61112279 is about 393.8910926628.

The spelling of 61112279 in words is "sixty-one million, one hundred twelve thousand, two hundred seventy-nine".