64151389 has 4 divisors (see below), whose sum is σ = 64390140. Its totient is φ = 63912640.

The previous prime is 64151371. The next prime is 64151401. The reversal of 64151389 is 98315146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98315146 = 2 ⋅49157573.

It can be written as a sum of positive squares in 2 ways, for example, as 31832164 + 32319225 = 5642^2 + 5685^2 .

It is a cyclic number.

It is not a de Polignac number, because 64151389 - 2⁵ = 64151357 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 (64151309) 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, 118972 + ... + 119509.

It is an arithmetic number, because the mean of its divisors is an integer number (16097535).

Almost surely, 2^64151389 is an apocalyptic number.

It is an amenable number.

64151389 is a deficient number, since it is larger than the sum of its proper divisors (238751).

64151389 is a wasteful number, since it uses less digits than its factorization.

64151389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238750.

The product of its digits is 25920, while the sum is 37.

The square root of 64151389 is about 8009.4562237395. The cubic root of 64151389 is about 400.3151453932.

The spelling of 64151389 in words is "sixty-four million, one hundred fifty-one thousand, three hundred eighty-nine".