149869261 has 2 divisors, whose sum is σ = 149869262. Its totient is φ = 149869260.

The previous prime is 149869243. The next prime is 149869273. The reversal of 149869261 is 162968941.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144720900 + 5148361 = 12030^2 + 2269^2 .

It is a cyclic number.

It is not a de Polignac number, because 149869261 - 2⁷ = 149869133 is a prime.

It is a super-2 number, since 2×149869261² = 44921590785372242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149869231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74934630 + 74934631.

It is an arithmetic number, because the mean of its divisors is an integer number (74934631).

Almost surely, 2^149869261 is an apocalyptic number.

It is an amenable number.

149869261 is a deficient number, since it is larger than the sum of its proper divisors (1).

149869261 is an equidigital number, since it uses as much as digits as its factorization.

149869261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 149869261 is about 12242.1101530741. The cubic root of 149869261 is about 531.1748720335.

The spelling of 149869261 in words is "one hundred forty-nine million, eight hundred sixty-nine thousand, two hundred sixty-one".