4957815397 has 4 divisors (see below), whose sum is σ = 4958512416. Its totient is φ = 4957118380.

The previous prime is 4957815391. The next prime is 4957815409. The reversal of 4957815397 is 7935187594.

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: 7935187594 = 2 ⋅3967593797.

It is a cyclic number.

It is not a de Polignac number, because 4957815397 - 2³¹ = 2810331749 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4957815391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337729 + ... + 352102.

It is an arithmetic number, because the mean of its divisors is an integer number (1239628104).

Almost surely, 2^4957815397 is an apocalyptic number.

It is an amenable number.

4957815397 is a deficient number, since it is larger than the sum of its proper divisors (697019).

4957815397 is an equidigital number, since it uses as much as digits as its factorization.

4957815397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697018.

The product of its digits is 9525600, while the sum is 58.

The square root of 4957815397 is about 70411.7560993901. The cubic root of 4957815397 is about 1705.1533815110.

The spelling of 4957815397 in words is "four billion, nine hundred fifty-seven million, eight hundred fifteen thousand, three hundred ninety-seven".