149711917 has 2 divisors, whose sum is σ = 149711918. Its totient is φ = 149711916.

The previous prime is 149711893. The next prime is 149711921. The reversal of 149711917 is 719117941.

It is a happy number.

149711917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117744201 + 31967716 = 10851^2 + 5654^2 .

It is a cyclic number.

It is not a de Polignac number, because 149711917 - 2⁷ = 149711789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149711917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149711957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74855958 + 74855959.

It is an arithmetic number, because the mean of its divisors is an integer number (74855959).

Almost surely, 2^149711917 is an apocalyptic number.

It is an amenable number.

149711917 is a deficient number, since it is larger than the sum of its proper divisors (1).

149711917 is an equidigital number, since it uses as much as digits as its factorization.

149711917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 40.

The square root of 149711917 is about 12235.6821223829. The cubic root of 149711917 is about 530.9889178579.

The spelling of 149711917 in words is "one hundred forty-nine million, seven hundred eleven thousand, nine hundred seventeen".