56947493 has 4 divisors (see below), whose sum is σ = 58022028. Its totient is φ = 55872960.

The previous prime is 56947489. The next prime is 56947507. The reversal of 56947493 is 39474965.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39474965 = 5 ⋅7894993.

It can be written as a sum of positive squares in 2 ways, for example, as 35259844 + 21687649 = 5938^2 + 4657^2 .

It is a cyclic number.

It is not a de Polignac number, because 56947493 - 2² = 56947489 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 (56947453) 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, 537188 + ... + 537293.

It is an arithmetic number, because the mean of its divisors is an integer number (14505507).

Almost surely, 2^56947493 is an apocalyptic number.

56947493 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

56947493 is a deficient number, since it is larger than the sum of its proper divisors (1074535).

56947493 is a wasteful number, since it uses less digits than its factorization.

56947493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074534.

The product of its digits is 816480, while the sum is 47.

The square root of 56947493 is about 7546.3562730632. The cubic root of 56947493 is about 384.7319053330.

The spelling of 56947493 in words is "fifty-six million, nine hundred forty-seven thousand, four hundred ninety-three".