87399851 has 8 divisors (see below), whose sum is σ = 108966144. Its totient is φ = 68103720.

The previous prime is 87399821. The next prime is 87399853. The reversal of 87399851 is 15899378.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87399851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87399851.

It is not an unprimeable number, because it can be changed into a prime (87399853) 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, 567455 + ... + 567608.

It is an arithmetic number, because the mean of its divisors is an integer number (13620768).

Almost surely, 2^87399851 is an apocalyptic number.

87399851 is a deficient number, since it is larger than the sum of its proper divisors (21566293).

87399851 is a wasteful number, since it uses less digits than its factorization.

87399851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135081.

The product of its digits is 544320, while the sum is 50.

The square root of 87399851 is about 9348.7887450728. The cubic root of 87399851 is about 443.7825596423.

The spelling of 87399851 in words is "eighty-seven million, three hundred ninety-nine thousand, eight hundred fifty-one".