42979637 has 4 divisors (see below), whose sum is σ = 43585056. Its totient is φ = 42374220.

The previous prime is 42979619. The next prime is 42979639. The reversal of 42979637 is 73697924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42979637 - 2⁸ = 42979381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42979591 and 42979600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42979639) 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, 302603 + ... + 302744.

It is an arithmetic number, because the mean of its divisors is an integer number (10896264).

Almost surely, 2^42979637 is an apocalyptic number.

It is an amenable number.

42979637 is a deficient number, since it is larger than the sum of its proper divisors (605419).

42979637 is an equidigital number, since it uses as much as digits as its factorization.

42979637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605418.

The product of its digits is 571536, while the sum is 47.

The square root of 42979637 is about 6555.8856762454. The cubic root of 42979637 is about 350.2844952179.

The spelling of 42979637 in words is "forty-two million, nine hundred seventy-nine thousand, six hundred thirty-seven".