154013749 has 2 divisors, whose sum is σ = 154013750. Its totient is φ = 154013748.

The previous prime is 154013747. The next prime is 154013779. The reversal of 154013749 is 947310451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152349649 + 1664100 = 12343^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 154013749 - 2¹ = 154013747 is a prime.

Together with 154013747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154013747) 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, 77006874 + 77006875.

It is an arithmetic number, because the mean of its divisors is an integer number (77006875).

Almost surely, 2^154013749 is an apocalyptic number.

It is an amenable number.

154013749 is a deficient number, since it is larger than the sum of its proper divisors (1).

154013749 is an equidigital number, since it uses as much as digits as its factorization.

154013749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 154013749 is about 12410.2275966237. The cubic root of 154013749 is about 536.0267921653.

The spelling of 154013749 in words is "one hundred fifty-four million, thirteen thousand, seven hundred forty-nine".