155774149 has 2 divisors, whose sum is σ = 155774150. Its totient is φ = 155774148.

The previous prime is 155774137. The next prime is 155774161. The reversal of 155774149 is 941477551.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (155774137) and next prime (155774161).

It can be written as a sum of positive squares in only one way, i.e., 120846049 + 34928100 = 10993^2 + 5910^2 .

It is a cyclic number.

It is not a de Polignac number, because 155774149 - 2¹³ = 155765957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155774249) 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, 77887074 + 77887075.

It is an arithmetic number, because the mean of its divisors is an integer number (77887075).

Almost surely, 2^155774149 is an apocalyptic number.

It is an amenable number.

155774149 is a deficient number, since it is larger than the sum of its proper divisors (1).

155774149 is an equidigital number, since it uses as much as digits as its factorization.

155774149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 43.

The square root of 155774149 is about 12480.9514461038. The cubic root of 155774149 is about 538.0613485686.

The spelling of 155774149 in words is "one hundred fifty-five million, seven hundred seventy-four thousand, one hundred forty-nine".