86172503 has 2 divisors, whose sum is σ = 86172504. Its totient is φ = 86172502.

The previous prime is 86172491. The next prime is 86172517. The reversal of 86172503 is 30527168.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86172503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86172503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86172553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43086251 + 43086252.

It is an arithmetic number, because the mean of its divisors is an integer number (43086252).

Almost surely, 2^86172503 is an apocalyptic number.

86172503 is a deficient number, since it is larger than the sum of its proper divisors (1).

86172503 is an equidigital number, since it uses as much as digits as its factorization.

86172503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 86172503 is about 9282.9145746366. The cubic root of 86172503 is about 441.6954266941.

The spelling of 86172503 in words is "eighty-six million, one hundred seventy-two thousand, five hundred three".