87198451 has 8 divisors (see below), whose sum is σ = 91893024. Its totient is φ = 82579200.

The previous prime is 87198407. The next prime is 87198469. The reversal of 87198451 is 15489178.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-87198451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87198398 and 87198407.

It is not an unprimeable number, because it can be changed into a prime (87198481) 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, 16446 + ... + 21091.

It is an arithmetic number, because the mean of its divisors is an integer number (11486628).

Almost surely, 2^87198451 is an apocalyptic number.

87198451 is a deficient number, since it is larger than the sum of its proper divisors (4694573).

87198451 is a wasteful number, since it uses less digits than its factorization.

87198451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37661.

The product of its digits is 80640, while the sum is 43.

The square root of 87198451 is about 9338.0110837373. The cubic root of 87198451 is about 443.4414204330.

The spelling of 87198451 in words is "eighty-seven million, one hundred ninety-eight thousand, four hundred fifty-one".