87457381 has 8 divisors (see below), whose sum is σ = 97987104. Its totient is φ = 77357520.

The previous prime is 87457379. The next prime is 87457421. The reversal of 87457381 is 18375478.

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 87457381 - 2¹ = 87457379 is a prime.

It is a super-2 number, since 2×87457381² = 15297586982758322, 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 (87457351) 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, 107035 + ... + 107848.

It is an arithmetic number, because the mean of its divisors is an integer number (12248388).

Almost surely, 2^87457381 is an apocalyptic number.

It is an amenable number.

87457381 is a deficient number, since it is larger than the sum of its proper divisors (10529723).

87457381 is a wasteful number, since it uses less digits than its factorization.

87457381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214931.

The product of its digits is 188160, while the sum is 43.

The square root of 87457381 is about 9351.8651080947. The cubic root of 87457381 is about 443.8799099643.

The spelling of 87457381 in words is "eighty-seven million, four hundred fifty-seven thousand, three hundred eighty-one".