149695771 has 16 divisors (see below), whose sum is σ = 157121536. Its totient is φ = 142502976.

The previous prime is 149695759. The next prime is 149695781. The reversal of 149695771 is 177596941.

149695771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 149695771 - 2¹³ = 149687579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149695781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323086 + ... + 323548.

It is an arithmetic number, because the mean of its divisors is an integer number (9820096).

Almost surely, 2^149695771 is an apocalyptic number.

149695771 is a deficient number, since it is larger than the sum of its proper divisors (7425765).

149695771 is a wasteful number, since it uses less digits than its factorization.

149695771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

The product of its digits is 476280, while the sum is 49.

The square root of 149695771 is about 12235.0223130160. The cubic root of 149695771 is about 530.9698286287.

The spelling of 149695771 in words is "one hundred forty-nine million, six hundred ninety-five thousand, seven hundred seventy-one".