320769149 has 4 divisors (see below), whose sum is σ = 322893600. Its totient is φ = 318644700.

The previous prime is 320769139. The next prime is 320769157. The reversal of 320769149 is 941967023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 941967023 = 31 ⋅30386033.

It is a cyclic number.

It is not a de Polignac number, because 320769149 - 2¹⁶ = 320703613 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 (320769139) 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, 1061999 + ... + 1062300.

It is an arithmetic number, because the mean of its divisors is an integer number (80723400).

Almost surely, 2^320769149 is an apocalyptic number.

It is an amenable number.

320769149 is a deficient number, since it is larger than the sum of its proper divisors (2124451).

320769149 is a wasteful number, since it uses less digits than its factorization.

320769149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124450.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 320769149 is about 17910.0292852915. The cubic root of 320769149 is about 684.5379511453.

The spelling of 320769149 in words is "three hundred twenty million, seven hundred sixty-nine thousand, one hundred forty-nine".