52947391 has 6 divisors (see below), whose sum is σ = 61591920. Its totient is φ = 45383436.

The previous prime is 52947383. The next prime is 52947409. The reversal of 52947391 is 19374925.

It is not a de Polignac number, because 52947391 - 2³ = 52947383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52947341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 540231 + ... + 540328.

It is an arithmetic number, because the mean of its divisors is an integer number (10265320).

Almost surely, 2^52947391 is an apocalyptic number.

52947391 is a deficient number, since it is larger than the sum of its proper divisors (8644529).

52947391 is a wasteful number, since it uses less digits than its factorization.

52947391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080573 (or 1080566 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 52947391 is about 7276.4957912446. The cubic root of 52947391 is about 375.5042484669.

The spelling of 52947391 in words is "fifty-two million, nine hundred forty-seven thousand, three hundred ninety-one".