149669057 has 2 divisors, whose sum is σ = 149669058. Its totient is φ = 149669056.

The previous prime is 149669021. The next prime is 149669059. The reversal of 149669057 is 750966941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148620481 + 1048576 = 12191^2 + 1024^2 .

It is a cyclic number.

It is not a de Polignac number, because 149669057 - 2⁶ = 149668993 is a prime.

Together with 149669059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149669059) 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, 74834528 + 74834529.

It is an arithmetic number, because the mean of its divisors is an integer number (74834529).

Almost surely, 2^149669057 is an apocalyptic number.

It is an amenable number.

149669057 is a deficient number, since it is larger than the sum of its proper divisors (1).

149669057 is an equidigital number, since it uses as much as digits as its factorization.

149669057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 149669057 is about 12233.9305621701. The cubic root of 149669057 is about 530.9382419607.

The spelling of 149669057 in words is "one hundred forty-nine million, six hundred sixty-nine thousand, fifty-seven".