42993897 has 4 divisors (see below), whose sum is σ = 57325200. Its totient is φ = 28662596.

The previous prime is 42993893. The next prime is 42993911. The reversal of 42993897 is 79839924.

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 a cyclic number.

It is not a de Polignac number, because 42993897 - 2² = 42993893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42993893) 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, 7165647 + ... + 7165652.

It is an arithmetic number, because the mean of its divisors is an integer number (14331300).

Almost surely, 2^42993897 is an apocalyptic number.

It is an amenable number.

42993897 is a deficient number, since it is larger than the sum of its proper divisors (14331303).

42993897 is a wasteful number, since it uses less digits than its factorization.

42993897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14331302.

The product of its digits is 979776, while the sum is 51.

The square root of 42993897 is about 6556.9731584017. The cubic root of 42993897 is about 350.3232306511.

The spelling of 42993897 in words is "forty-two million, nine hundred ninety-three thousand, eight hundred ninety-seven".