42961879 has 4 divisors (see below), whose sum is σ = 43479576. Its totient is φ = 42444184.

The previous prime is 42961871. The next prime is 42961883. The reversal of 42961879 is 97816924.

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 42961879 - 2³ = 42961871 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 (42961871) 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, 258724 + ... + 258889.

It is an arithmetic number, because the mean of its divisors is an integer number (10869894).

Almost surely, 2^42961879 is an apocalyptic number.

42961879 is a deficient number, since it is larger than the sum of its proper divisors (517697).

42961879 is an equidigital number, since it uses as much as digits as its factorization.

42961879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517696.

The product of its digits is 217728, while the sum is 46.

The square root of 42961879 is about 6554.5311807939. The cubic root of 42961879 is about 350.2362459430.

The spelling of 42961879 in words is "forty-two million, nine hundred sixty-one thousand, eight hundred seventy-nine".