86974919 has 2 divisors, whose sum is σ = 86974920. Its totient is φ = 86974918.

The previous prime is 86974903. The next prime is 86974931. The reversal of 86974919 is 91947968.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86974919 - 2⁴ = 86974903 is a prime.

It is a super-2 number, since 2×86974919² = 15129273070113122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86974949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43487459 + 43487460.

It is an arithmetic number, because the mean of its divisors is an integer number (43487460).

Almost surely, 2^86974919 is an apocalyptic number.

86974919 is a deficient number, since it is larger than the sum of its proper divisors (1).

86974919 is an equidigital number, since it uses as much as digits as its factorization.

86974919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 86974919 is about 9326.0344734512. The cubic root of 86974919 is about 443.0621775767.

The spelling of 86974919 in words is "eighty-six million, nine hundred seventy-four thousand, nine hundred nineteen".