149505869 has 2 divisors, whose sum is σ = 149505870. Its totient is φ = 149505868.

The previous prime is 149505827. The next prime is 149505943. The reversal of 149505869 is 968505941.

It is a happy number.

149505869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104816644 + 44689225 = 10238^2 + 6685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149505869 is a prime.

It is a super-2 number, since 2×149505869² = 44704009730890322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149505269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74752934 + 74752935.

It is an arithmetic number, because the mean of its divisors is an integer number (74752935).

Almost surely, 2^149505869 is an apocalyptic number.

It is an amenable number.

149505869 is a deficient number, since it is larger than the sum of its proper divisors (1).

149505869 is an equidigital number, since it uses as much as digits as its factorization.

149505869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 149505869 is about 12227.2592595397. The cubic root of 149505869 is about 530.7452066060.

The spelling of 149505869 in words is "one hundred forty-nine million, five hundred five thousand, eight hundred sixty-nine".