154931849 has 2 divisors, whose sum is σ = 154931850. Its totient is φ = 154931848.

The previous prime is 154931809. The next prime is 154931851. The reversal of 154931849 is 948139451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154878025 + 53824 = 12445^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 154931849 - 2⁸ = 154931593 is a prime.

It is a Sophie Germain prime.

Together with 154931851, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (154931809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77465924 + 77465925.

It is an arithmetic number, because the mean of its divisors is an integer number (77465925).

Almost surely, 2^154931849 is an apocalyptic number.

It is an amenable number.

154931849 is a deficient number, since it is larger than the sum of its proper divisors (1).

154931849 is an equidigital number, since it uses as much as digits as its factorization.

154931849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 154931849 is about 12447.1622870436. The cubic root of 154931849 is about 537.0897958395.

The spelling of 154931849 in words is "one hundred fifty-four million, nine hundred thirty-one thousand, eight hundred forty-nine".