3145657989 has 4 divisors (see below), whose sum is σ = 4194210656. Its totient is φ = 2097105324.

The previous prime is 3145657981. The next prime is 3145658027. The reversal of 3145657989 is 9897565413.

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.

It is not a de Polignac number, because 3145657989 - 2³ = 3145657981 is a prime.

It is a super-3 number, since 3×3145657989³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3145657981) 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, 524276329 + ... + 524276334.

It is an arithmetic number, because the mean of its divisors is an integer number (1048552664).

Almost surely, 2^3145657989 is an apocalyptic number.

It is an amenable number.

3145657989 is a deficient number, since it is larger than the sum of its proper divisors (1048552667).

3145657989 is a wasteful number, since it uses less digits than its factorization.

3145657989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048552666.

The product of its digits is 8164800, while the sum is 57.

The square root of 3145657989 is about 56086.1657541323. The cubic root of 3145657989 is about 1465.2233603533.

The spelling of 3145657989 in words is "three billion, one hundred forty-five million, six hundred fifty-seven thousand, nine hundred eighty-nine".