9149999 has 2 divisors, whose sum is σ = 9150000. Its totient is φ = 9149998.

The previous prime is 9149981. The next prime is 9150019. The reversal of 9149999 is 9999419.

It is a weak prime.

It is an emirp because it is prime and its reverse (9999419) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9149999 is a prime.

It is an Ulam number.

9149999 is a modest number, since divided by 9999 gives 914 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9149909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4574999 + 4575000.

It is an arithmetic number, because the mean of its divisors is an integer number (4575000).

Almost surely, 2^9149999 is an apocalyptic number.

9149999 is a deficient number, since it is larger than the sum of its proper divisors (1).

9149999 is an equidigital number, since it uses as much as digits as its factorization.

9149999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 236196, while the sum is 50.

The square root of 9149999 is about 3024.8965271559. The cubic root of 9149999 is about 209.1576155898.

The spelling of 9149999 in words is "nine million, one hundred forty-nine thousand, nine hundred ninety-nine".