99151081 has 2 divisors, whose sum is σ = 99151082. Its totient is φ = 99151080.

The previous prime is 99151069. The next prime is 99151097. The reversal of 99151081 is 18015199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94381225 + 4769856 = 9715^2 + 2184^2 .

It is a cyclic number.

It is not a de Polignac number, because 99151081 - 2¹¹ = 99149033 is a prime.

It is a super-2 number, since 2×99151081² = 19661873726937122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99151681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49575540 + 49575541.

It is an arithmetic number, because the mean of its divisors is an integer number (49575541).

Almost surely, 2^99151081 is an apocalyptic number.

It is an amenable number.

99151081 is a deficient number, since it is larger than the sum of its proper divisors (1).

99151081 is an equidigital number, since it uses as much as digits as its factorization.

99151081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 99151081 is about 9957.4635826600. The cubic root of 99151081 is about 462.8417047229.

The spelling of 99151081 in words is "ninety-nine million, one hundred fifty-one thousand, eighty-one".