56690437 has 2 divisors, whose sum is σ = 56690438. Its totient is φ = 56690436.

The previous prime is 56690407. The next prime is 56690453. The reversal of 56690437 is 73409665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34468641 + 22221796 = 5871^2 + 4714^2 .

It is a cyclic number.

It is not a de Polignac number, because 56690437 - 2¹¹ = 56688389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56690437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56690407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28345218 + 28345219.

It is an arithmetic number, because the mean of its divisors is an integer number (28345219).

Almost surely, 2^56690437 is an apocalyptic number.

It is an amenable number.

56690437 is a deficient number, since it is larger than the sum of its proper divisors (1).

56690437 is an equidigital number, since it uses as much as digits as its factorization.

56690437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 56690437 is about 7529.3052136303. The cubic root of 56690437 is about 384.1521500834.

The spelling of 56690437 in words is "fifty-six million, six hundred ninety thousand, four hundred thirty-seven".