87397719 has 4 divisors (see below), whose sum is σ = 116530296. Its totient is φ = 58265144.

The previous prime is 87397693. The next prime is 87397727. The reversal of 87397719 is 91779378.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87397719 - 2⁷ = 87397591 is a prime.

It is a super-2 number, since 2×87397719² = 15276722572805922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87397729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14566284 + ... + 14566289.

It is an arithmetic number, because the mean of its divisors is an integer number (29132574).

Almost surely, 2^87397719 is an apocalyptic number.

87397719 is a deficient number, since it is larger than the sum of its proper divisors (29132577).

87397719 is a wasteful number, since it uses less digits than its factorization.

87397719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29132576.

The product of its digits is 666792, while the sum is 51.

The square root of 87397719 is about 9348.6747189107. The cubic root of 87397719 is about 443.7789511231.

The spelling of 87397719 in words is "eighty-seven million, three hundred ninety-seven thousand, seven hundred nineteen".