149711897 has 4 divisors (see below), whose sum is σ = 149811216. Its totient is φ = 149612580.

The previous prime is 149711893. The next prime is 149711917. The reversal of 149711897 is 798117941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149711897 - 2² = 149711893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149711893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47363 + ... + 50424.

It is an arithmetic number, because the mean of its divisors is an integer number (37452804).

Almost surely, 2^149711897 is an apocalyptic number.

It is an amenable number.

149711897 is a deficient number, since it is larger than the sum of its proper divisors (99319).

149711897 is an equidigital number, since it uses as much as digits as its factorization.

149711897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99318.

The product of its digits is 127008, while the sum is 47.

The square root of 149711897 is about 12235.6813051011. The cubic root of 149711897 is about 530.9888942129.

The spelling of 149711897 in words is "one hundred forty-nine million, seven hundred eleven thousand, eight hundred ninety-seven".