87451393 has 8 divisors (see below), whose sum is σ = 89271360. Its totient is φ = 85642800.

The previous prime is 87451381. The next prime is 87451409. The reversal of 87451393 is 39315478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87451393 - 2⁵ = 87451361 is a prime.

It is a super-2 number, since 2×87451393² = 15295492275280898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87451303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13668 + ... + 19018.

It is an arithmetic number, because the mean of its divisors is an integer number (11158920).

Almost surely, 2^87451393 is an apocalyptic number.

It is an amenable number.

87451393 is a deficient number, since it is larger than the sum of its proper divisors (1819967).

87451393 is a wasteful number, since it uses less digits than its factorization.

87451393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5687.

The product of its digits is 90720, while the sum is 40.

The square root of 87451393 is about 9351.5449525733. The cubic root of 87451393 is about 443.8697792639.

The spelling of 87451393 in words is "eighty-seven million, four hundred fifty-one thousand, three hundred ninety-three".