42979519 has 8 divisors (see below), whose sum is σ = 49645008. Its totient is φ = 36773760.

The previous prime is 42979507. The next prime is 42979523. The reversal of 42979519 is 91597924.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42979519 - 2⁵ = 42979487 is a prime.

It is a super-2 number, since 2×42979519² = 3694478106942722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42979589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114732 + ... + 115105.

It is an arithmetic number, because the mean of its divisors is an integer number (6205626).

Almost surely, 2^42979519 is an apocalyptic number.

42979519 is a deficient number, since it is larger than the sum of its proper divisors (6665489).

42979519 is a wasteful number, since it uses less digits than its factorization.

42979519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229865.

The product of its digits is 204120, while the sum is 46.

The square root of 42979519 is about 6555.8766766924. The cubic root of 42979519 is about 350.2841746505.

The spelling of 42979519 in words is "forty-two million, nine hundred seventy-nine thousand, five hundred nineteen".