87497719 has 4 divisors (see below), whose sum is σ = 87516720. Its totient is φ = 87478720.

The previous prime is 87497699. The next prime is 87497737. The reversal of 87497719 is 91779478.

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 87497719 - 2¹³ = 87489527 is a prime.

It is a super-2 number, since 2×87497719² = 15311701660405922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87497749) 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, 2262 + ... + 13420.

It is an arithmetic number, because the mean of its divisors is an integer number (21879180).

Almost surely, 2^87497719 is an apocalyptic number.

87497719 is a deficient number, since it is larger than the sum of its proper divisors (19001).

87497719 is a wasteful number, since it uses less digits than its factorization.

87497719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19000.

The product of its digits is 889056, while the sum is 52.

The square root of 87497719 is about 9354.0215415617. The cubic root of 87497719 is about 443.9481431063.

The spelling of 87497719 in words is "eighty-seven million, four hundred ninety-seven thousand, seven hundred nineteen".