56473987 has 2 divisors, whose sum is σ = 56473988. Its totient is φ = 56473986.

The previous prime is 56473913. The next prime is 56474009. The reversal of 56473987 is 78937465.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56473987 is a prime.

It is a super-2 number, since 2×56473987² = 6378622415352338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56473987.

It is not a weakly prime, because it can be changed into another prime (56473787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28236993 + 28236994.

It is an arithmetic number, because the mean of its divisors is an integer number (28236994).

Almost surely, 2^56473987 is an apocalyptic number.

56473987 is a deficient number, since it is larger than the sum of its proper divisors (1).

56473987 is an equidigital number, since it uses as much as digits as its factorization.

56473987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 56473987 is about 7514.9176309525. The cubic root of 56473987 is about 383.6626155333.

The spelling of 56473987 in words is "fifty-six million, four hundred seventy-three thousand, nine hundred eighty-seven".