149789071 has 4 divisors (see below), whose sum is σ = 151114752. Its totient is φ = 148463392.

The previous prime is 149789053. The next prime is 149789093. The reversal of 149789071 is 170987941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170987941 = 61 ⋅2803081.

It is a cyclic number.

It is not a de Polignac number, because 149789071 - 2¹⁵ = 149756303 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 (149709071) 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, 662671 + ... + 662896.

It is an arithmetic number, because the mean of its divisors is an integer number (37778688).

Almost surely, 2^149789071 is an apocalyptic number.

149789071 is a deficient number, since it is larger than the sum of its proper divisors (1325681).

149789071 is a wasteful number, since it uses less digits than its factorization.

149789071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325680.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 149789071 is about 12238.8345441876. The cubic root of 149789071 is about 531.0801171963.

The spelling of 149789071 in words is "one hundred forty-nine million, seven hundred eighty-nine thousand, seventy-one".