149039693 has 6 divisors (see below), whose sum is σ = 163820622. Its totient is φ = 135490520.

The previous prime is 149039689. The next prime is 149039711. The reversal of 149039693 is 396930941.

It can be written as a sum of positive squares in only one way, i.e., 141657604 + 7382089 = 11902^2 + 2717^2 .

It is not a de Polignac number, because 149039693 - 2² = 149039689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149039593) 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, 615746 + ... + 615987.

It is an arithmetic number, because the mean of its divisors is an integer number (27303437).

Almost surely, 2^149039693 is an apocalyptic number.

It is an amenable number.

149039693 is a deficient number, since it is larger than the sum of its proper divisors (14780929).

149039693 is a wasteful number, since it uses less digits than its factorization.

149039693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231755 (or 1231744 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 149039693 is about 12208.1813960966. The cubic root of 149039693 is about 530.1929913044.

The spelling of 149039693 in words is "one hundred forty-nine million, thirty-nine thousand, six hundred ninety-three".