3145391857 has 8 divisors (see below), whose sum is σ = 3213257472. Its totient is φ = 3077565600.

The previous prime is 3145391827. The next prime is 3145391863. The reversal of 3145391857 is 7581935413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3145391857 - 2⁷ = 3145391729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3145391827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198757 + ... + 213997.

It is an arithmetic number, because the mean of its divisors is an integer number (401657184).

Almost surely, 2^3145391857 is an apocalyptic number.

It is an amenable number.

3145391857 is a deficient number, since it is larger than the sum of its proper divisors (67865615).

3145391857 is a wasteful number, since it uses less digits than its factorization.

3145391857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19679.

The product of its digits is 453600, while the sum is 46.

The square root of 3145391857 is about 56083.7931759256. The cubic root of 3145391857 is about 1465.1820384400.

The spelling of 3145391857 in words is "three billion, one hundred forty-five million, three hundred ninety-one thousand, eight hundred fifty-seven".