149889897 has 6 divisors (see below), whose sum is σ = 216507642. Its totient is φ = 99926592.

The previous prime is 149889877. The next prime is 149889937. The reversal of 149889897 is 798988941.

It can be written as a sum of positive squares in only one way, i.e., 116122176 + 33767721 = 10776^2 + 5811^2 .

It is not a de Polignac number, because 149889897 - 2⁷ = 149889769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149889877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8327208 + ... + 8327225.

It is an arithmetic number, because the mean of its divisors is an integer number (36084607).

Almost surely, 2^149889897 is an apocalyptic number.

It is an amenable number.

149889897 is a deficient number, since it is larger than the sum of its proper divisors (66617745).

149889897 is a wasteful number, since it uses less digits than its factorization.

149889897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16654439 (or 16654436 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 63.

The square root of 149889897 is about 12242.9529526173. The cubic root of 149889897 is about 531.1992506631.

The spelling of 149889897 in words is "one hundred forty-nine million, eight hundred eighty-nine thousand, eight hundred ninety-seven".