99172487 has 8 divisors (see below), whose sum is σ = 101418480. Its totient is φ = 96940480.

The previous prime is 99172439. The next prime is 99172501. The reversal of 99172487 is 78427199.

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-99172487 is a prime.

It is a pancake number, because a pancake can be divided into 99172487 parts by 14083 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99172427) 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, 11564 + ... + 18222.

It is an arithmetic number, because the mean of its divisors is an integer number (12677310).

Almost surely, 2^99172487 is an apocalyptic number.

99172487 is a deficient number, since it is larger than the sum of its proper divisors (2245993).

99172487 is a wasteful number, since it uses less digits than its factorization.

99172487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993.

The product of its digits is 254016, while the sum is 47.

The square root of 99172487 is about 9958.5383967729. The cubic root of 99172487 is about 462.8750103831.

The spelling of 99172487 in words is "ninety-nine million, one hundred seventy-two thousand, four hundred eighty-seven".