149693791 has 4 divisors (see below), whose sum is σ = 161208712. Its totient is φ = 138178872.

The previous prime is 149693777. The next prime is 149693801. The reversal of 149693791 is 197396941.

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

It is not a de Polignac number, because 149693791 - 2⁵ = 149693759 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 (149693741) 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, 5757441 + ... + 5757466.

It is an arithmetic number, because the mean of its divisors is an integer number (40302178).

Almost surely, 2^149693791 is an apocalyptic number.

149693791 is a deficient number, since it is larger than the sum of its proper divisors (11514921).

149693791 is a wasteful number, since it uses less digits than its factorization.

149693791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11514920.

The product of its digits is 367416, while the sum is 49.

The square root of 149693791 is about 12234.9413974894. The cubic root of 149693791 is about 530.9674876031.

The spelling of 149693791 in words is "one hundred forty-nine million, six hundred ninety-three thousand, seven hundred ninety-one".