42696989 has 4 divisors (see below), whose sum is σ = 42739356. Its totient is φ = 42654624.

The previous prime is 42696977. The next prime is 42696991. The reversal of 42696989 is 98969624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40896025 + 1800964 = 6395^2 + 1342^2 .

It is a cyclic number.

It is not a de Polignac number, because 42696989 - 2⁸ = 42696733 is a prime.

It is a super-2 number, since 2×42696989² = 3646065739332242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42696989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42696089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19634 + ... + 21699.

It is an arithmetic number, because the mean of its divisors is an integer number (10684839).

Almost surely, 2^42696989 is an apocalyptic number.

It is an amenable number.

42696989 is a deficient number, since it is larger than the sum of its proper divisors (42367).

42696989 is a wasteful number, since it uses less digits than its factorization.

42696989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42366.

The product of its digits is 1679616, while the sum is 53.

The square root of 42696989 is about 6534.2933053238. The cubic root of 42696989 is about 349.5149444116.

The spelling of 42696989 in words is "forty-two million, six hundred ninety-six thousand, nine hundred eighty-nine".