87738621 has 8 divisors (see below), whose sum is σ = 117123840. Its totient is φ = 58422912.

The previous prime is 87738617. The next prime is 87738631. The reversal of 87738621 is 12683778.

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

It is not a de Polignac number, because 87738621 - 2² = 87738617 is a prime.

It is a super-2 number, since 2×87738621² = 15396131229963282, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87738631) 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, 14356 + ... + 19533.

It is an arithmetic number, because the mean of its divisors is an integer number (14640480).

Almost surely, 2^87738621 is an apocalyptic number.

It is an amenable number.

87738621 is a deficient number, since it is larger than the sum of its proper divisors (29385219).

87738621 is a wasteful number, since it uses less digits than its factorization.

87738621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34755.

The product of its digits is 112896, while the sum is 42.

The square root of 87738621 is about 9366.8896118189. The cubic root of 87738621 is about 444.3552013152.

The spelling of 87738621 in words is "eighty-seven million, seven hundred thirty-eight thousand, six hundred twenty-one".