99401539 has 2 divisors, whose sum is σ = 99401540. Its totient is φ = 99401538.

The previous prime is 99401527. The next prime is 99401579. The reversal of 99401539 is 93510499.

It is an a-pointer prime, because the next prime (99401579) can be obtained adding 99401539 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99401539 - 2⁷ = 99401411 is a prime.

It is not a weakly prime, because it can be changed into another prime (99401579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49700769 + 49700770.

It is an arithmetic number, because the mean of its divisors is an integer number (49700770).

Almost surely, 2^99401539 is an apocalyptic number.

99401539 is a deficient number, since it is larger than the sum of its proper divisors (1).

99401539 is an equidigital number, since it uses as much as digits as its factorization.

99401539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 99401539 is about 9970.0320460869. The cubic root of 99401539 is about 463.2310934405.

The spelling of 99401539 in words is "ninety-nine million, four hundred one thousand, five hundred thirty-nine".