5578231987 has 2 divisors, whose sum is σ = 5578231988. Its totient is φ = 5578231986.

The previous prime is 5578231979. The next prime is 5578231991. The reversal of 5578231987 is 7891328755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5578231987 - 2³ = 5578231979 is a prime.

It is a super-2 number, since 2×5578231987² = 62233344201579936338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5578231187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2789115993 + 2789115994.

It is an arithmetic number, because the mean of its divisors is an integer number (2789115994).

Almost surely, 2^5578231987 is an apocalyptic number.

5578231987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5578231987 is an equidigital number, since it uses as much as digits as its factorization.

5578231987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 55.

The square root of 5578231987 is about 74687.5624652458. The cubic root of 5578231987 is about 1773.5040744931.

The spelling of 5578231987 in words is "five billion, five hundred seventy-eight million, two hundred thirty-one thousand, nine hundred eighty-seven".