154979879 has 2 divisors, whose sum is σ = 154979880. Its totient is φ = 154979878.

The previous prime is 154979873. The next prime is 154979887. The reversal of 154979879 is 978979451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 154979879 - 2¹² = 154975783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154979873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77489939 + 77489940.

It is an arithmetic number, because the mean of its divisors is an integer number (77489940).

Almost surely, 2^154979879 is an apocalyptic number.

154979879 is a deficient number, since it is larger than the sum of its proper divisors (1).

154979879 is an equidigital number, since it uses as much as digits as its factorization.

154979879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 59.

The square root of 154979879 is about 12449.0914929564. The cubic root of 154979879 is about 537.1452906863.

The spelling of 154979879 in words is "one hundred fifty-four million, nine hundred seventy-nine thousand, eight hundred seventy-nine".