154240199 has 2 divisors, whose sum is σ = 154240200. Its totient is φ = 154240198.

The previous prime is 154240193. The next prime is 154240213. The reversal of 154240199 is 991042451.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154240199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154240193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77120099 + 77120100.

It is an arithmetic number, because the mean of its divisors is an integer number (77120100).

Almost surely, 2^154240199 is an apocalyptic number.

154240199 is a deficient number, since it is larger than the sum of its proper divisors (1).

154240199 is an equidigital number, since it uses as much as digits as its factorization.

154240199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 154240199 is about 12419.3477687035. The cubic root of 154240199 is about 536.2893744034.

The spelling of 154240199 in words is "one hundred fifty-four million, two hundred forty thousand, one hundred ninety-nine".