99115501 has 2 divisors, whose sum is σ = 99115502. Its totient is φ = 99115500.

The previous prime is 99115493. The next prime is 99115543. The reversal of 99115501 is 10551199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76562500 + 22553001 = 8750^2 + 4749^2 .

It is an emirp because it is prime and its reverse (10551199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99115501 - 2³ = 99115493 is a prime.

It is equal to p_5713465 and since 99115501 and 5713465 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99125501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49557750 + 49557751.

It is an arithmetic number, because the mean of its divisors is an integer number (49557751).

Almost surely, 2^99115501 is an apocalyptic number.

It is an amenable number.

99115501 is a deficient number, since it is larger than the sum of its proper divisors (1).

99115501 is an equidigital number, since it uses as much as digits as its factorization.

99115501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2025, while the sum is 31.

The square root of 99115501 is about 9955.6768227981. The cubic root of 99115501 is about 462.7863350860.

It can be divided in two parts, 99 and 115501, that added together give a square (115600 = 340²).

The spelling of 99115501 in words is "ninety-nine million, one hundred fifteen thousand, five hundred one".