154452139 has 2 divisors, whose sum is σ = 154452140. Its totient is φ = 154452138.

The previous prime is 154452091. The next prime is 154452143. The reversal of 154452139 is 931254451.

It is a strong prime.

It is an emirp because it is prime and its reverse (931254451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154452139 - 2¹⁵ = 154419371 is a prime.

It is not a weakly prime, because it can be changed into another prime (154452149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77226069 + 77226070.

It is an arithmetic number, because the mean of its divisors is an integer number (77226070).

Almost surely, 2^154452139 is an apocalyptic number.

154452139 is a deficient number, since it is larger than the sum of its proper divisors (1).

154452139 is an equidigital number, since it uses as much as digits as its factorization.

154452139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 154452139 is about 12427.8774937638. The cubic root of 154452139 is about 536.5348987008.

The spelling of 154452139 in words is "one hundred fifty-four million, four hundred fifty-two thousand, one hundred thirty-nine".