154920385 has 4 divisors (see below), whose sum is σ = 185904468. Its totient is φ = 123936304.

The previous prime is 154920379. The next prime is 154920421. The reversal of 154920385 is 583029451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583029451 = 3169 ⋅183979.

It can be written as a sum of positive squares in 2 ways, for example, as 122567041 + 32353344 = 11071^2 + 5688^2 .

It is a cyclic number.

It is not a de Polignac number, because 154920385 - 2³ = 154920377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15492034 + ... + 15492043.

It is an arithmetic number, because the mean of its divisors is an integer number (46476117).

Almost surely, 2^154920385 is an apocalyptic number.

It is an amenable number.

154920385 is a deficient number, since it is larger than the sum of its proper divisors (30984083).

154920385 is an equidigital number, since it uses as much as digits as its factorization.

154920385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30984082.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 154920385 is about 12446.7017719555. The cubic root of 154920385 is about 537.0765484034.

The spelling of 154920385 in words is "one hundred fifty-four million, nine hundred twenty thousand, three hundred eighty-five".