149694817 has 4 divisors (see below), whose sum is σ = 151929136. Its totient is φ = 147460500.

The previous prime is 149694791. The next prime is 149694821. The reversal of 149694817 is 718496941.

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 149694817 - 2¹⁵ = 149662049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149692817) 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, 1117059 + ... + 1117192.

It is an arithmetic number, because the mean of its divisors is an integer number (37982284).

Almost surely, 2^149694817 is an apocalyptic number.

It is an amenable number.

149694817 is a deficient number, since it is larger than the sum of its proper divisors (2234319).

149694817 is an equidigital number, since it uses as much as digits as its factorization.

149694817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234318.

The product of its digits is 435456, while the sum is 49.

The square root of 149694817 is about 12234.9833265109. The cubic root of 149694817 is about 530.9687006825.

The spelling of 149694817 in words is "one hundred forty-nine million, six hundred ninety-four thousand, eight hundred seventeen".