87421319 has 2 divisors, whose sum is σ = 87421320. Its totient is φ = 87421318.

The previous prime is 87421291. The next prime is 87421331. The reversal of 87421319 is 91312478.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87421319 - 2¹⁶ = 87355783 is a prime.

It is a super-2 number, since 2×87421319² = 15284974031399522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87421219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43710659 + 43710660.

It is an arithmetic number, because the mean of its divisors is an integer number (43710660).

Almost surely, 2^87421319 is an apocalyptic number.

87421319 is a deficient number, since it is larger than the sum of its proper divisors (1).

87421319 is an equidigital number, since it uses as much as digits as its factorization.

87421319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 87421319 is about 9349.9368447065. The cubic root of 87421319 is about 443.8188920614.

The spelling of 87421319 in words is "eighty-seven million, four hundred twenty-one thousand, three hundred nineteen".