149599799 has 2 divisors, whose sum is σ = 149599800. Its totient is φ = 149599798.

The previous prime is 149599763. The next prime is 149599819. The reversal of 149599799 is 997995941.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (997995941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149599799 - 2²⁰ = 148551223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149599739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74799899 + 74799900.

It is an arithmetic number, because the mean of its divisors is an integer number (74799900).

Almost surely, 2^149599799 is an apocalyptic number.

149599799 is a deficient number, since it is larger than the sum of its proper divisors (1).

149599799 is an equidigital number, since it uses as much as digits as its factorization.

149599799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8266860, while the sum is 62.

The square root of 149599799 is about 12231.0996643801. The cubic root of 149599799 is about 530.8563337051.

The spelling of 149599799 in words is "one hundred forty-nine million, five hundred ninety-nine thousand, seven hundred ninety-nine".