56654921 has 2 divisors, whose sum is σ = 56654922. Its totient is φ = 56654920.

The previous prime is 56654861. The next prime is 56654959. The reversal of 56654921 is 12945665.

It is an a-pointer prime, because the next prime (56654959) can be obtained adding 56654921 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29822521 + 26832400 = 5461^2 + 5180^2 .

It is a cyclic number.

It is not a de Polignac number, because 56654921 - 2¹⁰ = 56653897 is a prime.

It is not a weakly prime, because it can be changed into another prime (56654321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28327460 + 28327461.

It is an arithmetic number, because the mean of its divisors is an integer number (28327461).

Almost surely, 2^56654921 is an apocalyptic number.

It is an amenable number.

56654921 is a deficient number, since it is larger than the sum of its proper divisors (1).

56654921 is an equidigital number, since it uses as much as digits as its factorization.

56654921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 56654921 is about 7526.9463263664. The cubic root of 56654921 is about 384.0719108128.

It can be divided in two parts, 56654 and 921, that added together give a palindrome (57575).

The spelling of 56654921 in words is "fifty-six million, six hundred fifty-four thousand, nine hundred twenty-one".