87143723 has 4 divisors (see below), whose sum is σ = 87255240. Its totient is φ = 87032208.

The previous prime is 87143699. The next prime is 87143729. The reversal of 87143723 is 32734178.

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 87143723 - 2⁶ = 87143659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87143729) 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, 54578 + ... + 56151.

It is an arithmetic number, because the mean of its divisors is an integer number (21813810).

Almost surely, 2^87143723 is an apocalyptic number.

87143723 is a deficient number, since it is larger than the sum of its proper divisors (111517).

87143723 is a wasteful number, since it uses less digits than its factorization.

87143723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111516.

The product of its digits is 28224, while the sum is 35.

The square root of 87143723 is about 9335.0802353274. The cubic root of 87143723 is about 443.3486292547.

The spelling of 87143723 in words is "eighty-seven million, one hundred forty-three thousand, seven hundred twenty-three".