87143913 has 12 divisors (see below), whose sum is σ = 126399988. Its totient is φ = 57853440.

The previous prime is 87143897. The next prime is 87143957. The reversal of 87143913 is 31934178.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75116889 + 12027024 = 8667^2 + 3468^2 .

It is not a de Polignac number, because 87143913 - 2⁴ = 87143897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87143963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17920 + ... + 22257.

Almost surely, 2^87143913 is an apocalyptic number.

It is an amenable number.

87143913 is a deficient number, since it is larger than the sum of its proper divisors (39256075).

87143913 is a wasteful number, since it uses less digits than its factorization.

87143913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40424 (or 40421 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 87143913 is about 9335.0904119885. The cubic root of 87143913 is about 443.3489514664.

The spelling of 87143913 in words is "eighty-seven million, one hundred forty-three thousand, nine hundred thirteen".