149994391 has 2 divisors, whose sum is σ = 149994392. Its totient is φ = 149994390.

The previous prime is 149994373. The next prime is 149994407. The reversal of 149994391 is 193499941.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149994391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149994311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74997195 + 74997196.

It is an arithmetic number, because the mean of its divisors is an integer number (74997196).

Almost surely, 2^149994391 is an apocalyptic number.

149994391 is a deficient number, since it is larger than the sum of its proper divisors (1).

149994391 is an equidigital number, since it uses as much as digits as its factorization.

149994391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 49.

The square root of 149994391 is about 12247.2197253091. The cubic root of 149994391 is about 531.3226617844.

The spelling of 149994391 in words is "one hundred forty-nine million, nine hundred ninety-four thousand, three hundred ninety-one".