7721140087 has 32 divisors (see below), whose sum is σ = 8461065600. Its totient is φ = 7018598400.

The previous prime is 7721140073. The next prime is 7721140159. The reversal of 7721140087 is 7800411277.

It is a cyclic number.

It is not a de Polignac number, because 7721140087 - 2¹⁵ = 7721107319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7721140187) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24826662 + ... + 24826972.

It is an arithmetic number, because the mean of its divisors is an integer number (264408300).

Almost surely, 2^7721140087 is an apocalyptic number.

7721140087 is a deficient number, since it is larger than the sum of its proper divisors (739925513).

7721140087 is a wasteful number, since it uses less digits than its factorization.

7721140087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 21952, while the sum is 37.

The square root of 7721140087 is about 87870.0181347426. The cubic root of 7721140087 is about 1976.4863105004.

The spelling of 7721140087 in words is "seven billion, seven hundred twenty-one million, one hundred forty thousand, eighty-seven".