42693621 has 4 divisors (see below), whose sum is σ = 56924832. Its totient is φ = 28462412.

The previous prime is 42693619. The next prime is 42693631. The reversal of 42693621 is 12639624.

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 42693621 - 2¹ = 42693619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42693631) 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, 7115601 + ... + 7115606.

It is an arithmetic number, because the mean of its divisors is an integer number (14231208).

Almost surely, 2^42693621 is an apocalyptic number.

It is an amenable number.

42693621 is a deficient number, since it is larger than the sum of its proper divisors (14231211).

42693621 is a wasteful number, since it uses less digits than its factorization.

42693621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14231210.

The product of its digits is 15552, while the sum is 33.

The square root of 42693621 is about 6534.0355830069. The cubic root of 42693621 is about 349.5057540891.

The spelling of 42693621 in words is "forty-two million, six hundred ninety-three thousand, six hundred twenty-one".