154321613 has 2 divisors, whose sum is σ = 154321614. Its totient is φ = 154321612.

The previous prime is 154321603. The next prime is 154321679. The reversal of 154321613 is 316123451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153834409 + 487204 = 12403^2 + 698^2 .

It is a cyclic number.

It is not a de Polignac number, because 154321613 - 2⁶ = 154321549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154321603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77160806 + 77160807.

It is an arithmetic number, because the mean of its divisors is an integer number (77160807).

Almost surely, 2^154321613 is an apocalyptic number.

It is an amenable number.

154321613 is a deficient number, since it is larger than the sum of its proper divisors (1).

154321613 is an equidigital number, since it uses as much as digits as its factorization.

154321613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 154321613 is about 12422.6250446514. The cubic root of 154321613 is about 536.3837159641.

The spelling of 154321613 in words is "one hundred fifty-four million, three hundred twenty-one thousand, six hundred thirteen".