42699739 has 4 divisors (see below), whose sum is σ = 43853824. Its totient is φ = 41545656.

The previous prime is 42699721. The next prime is 42699743. The reversal of 42699739 is 93799624.

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 42699739 - 2⁷ = 42699611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42699692 and 42699701.

It is not an unprimeable number, because it can be changed into a prime (42699719) 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, 576987 + ... + 577060.

It is an arithmetic number, because the mean of its divisors is an integer number (10963456).

Almost surely, 2^42699739 is an apocalyptic number.

42699739 is a deficient number, since it is larger than the sum of its proper divisors (1154085).

42699739 is a wasteful number, since it uses less digits than its factorization.

42699739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154084.

The product of its digits is 734832, while the sum is 49.

The square root of 42699739 is about 6534.5037302002. The cubic root of 42699739 is about 349.5224480278.

The spelling of 42699739 in words is "forty-two million, six hundred ninety-nine thousand, seven hundred thirty-nine".