42953391 has 12 divisors (see below), whose sum is σ = 66816568. Its totient is φ = 26432784.

The previous prime is 42953387. The next prime is 42953399. The reversal of 42953391 is 19335924.

It is a happy number.

It is not a de Polignac number, because 42953391 - 2² = 42953387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42953399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183445 + ... + 183678.

Almost surely, 2^42953391 is an apocalyptic number.

42953391 is a deficient number, since it is larger than the sum of its proper divisors (23863177).

42953391 is a wasteful number, since it uses less digits than its factorization.

42953391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367142 (or 367139 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 42953391 is about 6553.8836578017. The cubic root of 42953391 is about 350.2131789735.

The spelling of 42953391 in words is "forty-two million, nine hundred fifty-three thousand, three hundred ninety-one".