149453999 has 2 divisors, whose sum is σ = 149454000. Its totient is φ = 149453998.

The previous prime is 149453947. The next prime is 149454001. The reversal of 149453999 is 999354941.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149453999 - 2⁸ = 149453743 is a prime.

Together with 149454001, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149453999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149453299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74726999 + 74727000.

It is an arithmetic number, because the mean of its divisors is an integer number (74727000).

Almost surely, 2^149453999 is an apocalyptic number.

149453999 is a deficient number, since it is larger than the sum of its proper divisors (1).

149453999 is an equidigital number, since it uses as much as digits as its factorization.

149453999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 149453999 is about 12225.1379951312. The cubic root of 149453999 is about 530.6838200789.

The spelling of 149453999 in words is "one hundred forty-nine million, four hundred fifty-three thousand, nine hundred ninety-nine".