149005897 has 4 divisors (see below), whose sum is σ = 149829316. Its totient is φ = 148182480.

The previous prime is 149005873. The next prime is 149005907. The reversal of 149005897 is 798500941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74287161 + 74718736 = 8619^2 + 8644^2 .

It is a cyclic number.

It is not a de Polignac number, because 149005897 - 2¹¹ = 149003849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149005817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411438 + ... + 411799.

It is an arithmetic number, because the mean of its divisors is an integer number (37457329).

Almost surely, 2^149005897 is an apocalyptic number.

It is an amenable number.

149005897 is a deficient number, since it is larger than the sum of its proper divisors (823419).

149005897 is an equidigital number, since it uses as much as digits as its factorization.

149005897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823418.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 149005897 is about 12206.7971638755. The cubic root of 149005897 is about 530.1529130395.

The spelling of 149005897 in words is "one hundred forty-nine million, five thousand, eight hundred ninety-seven".