154190749 has 2 divisors, whose sum is σ = 154190750. Its totient is φ = 154190748.

The previous prime is 154190693. The next prime is 154190759. The reversal of 154190749 is 947091451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138532900 + 15657849 = 11770^2 + 3957^2 .

It is a cyclic number.

It is not a de Polignac number, because 154190749 - 2⁹ = 154190237 is a prime.

It is equal to p_8666644 and since 154190749 and 8666644 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154190759) 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, 77095374 + 77095375.

It is an arithmetic number, because the mean of its divisors is an integer number (77095375).

Almost surely, 2^154190749 is an apocalyptic number.

It is an amenable number.

154190749 is a deficient number, since it is larger than the sum of its proper divisors (1).

154190749 is an equidigital number, since it uses as much as digits as its factorization.

154190749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 154190749 is about 12417.3567638206. The cubic root of 154190749 is about 536.2320561333.

The spelling of 154190749 in words is "one hundred fifty-four million, one hundred ninety thousand, seven hundred forty-nine".