154039979 has 2 divisors, whose sum is σ = 154039980. Its totient is φ = 154039978.

The previous prime is 154039943. The next prime is 154039981. The reversal of 154039979 is 979930451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154039979 - 2⁸ = 154039723 is a prime.

Together with 154039981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (153039979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77019989 + 77019990.

It is an arithmetic number, because the mean of its divisors is an integer number (77019990).

Almost surely, 2^154039979 is an apocalyptic number.

154039979 is a deficient number, since it is larger than the sum of its proper divisors (1).

154039979 is an equidigital number, since it uses as much as digits as its factorization.

154039979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 154039979 is about 12411.2843412759. The cubic root of 154039979 is about 536.0572205842.

The spelling of 154039979 in words is "one hundred fifty-four million, thirty-nine thousand, nine hundred seventy-nine".