149349817 has 2 divisors, whose sum is σ = 149349818. Its totient is φ = 149349816.

The previous prime is 149349799. The next prime is 149349857. The reversal of 149349817 is 718943941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118613881 + 30735936 = 10891^2 + 5544^2 .

It is a cyclic number.

It is not a de Polignac number, because 149349817 - 2¹¹ = 149347769 is a prime.

It is not a weakly prime, because it can be changed into another prime (149349857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74674908 + 74674909.

It is an arithmetic number, because the mean of its divisors is an integer number (74674909).

Almost surely, 2^149349817 is an apocalyptic number.

It is an amenable number.

149349817 is a deficient number, since it is larger than the sum of its proper divisors (1).

149349817 is an equidigital number, since it uses as much as digits as its factorization.

149349817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 149349817 is about 12220.8762779107. The cubic root of 149349817 is about 530.5604810051.

The spelling of 149349817 in words is "one hundred forty-nine million, three hundred forty-nine thousand, eight hundred seventeen".