3447478157 has 4 divisors (see below), whose sum is σ = 3447625020. Its totient is φ = 3447331296.

The previous prime is 3447478109. The next prime is 3447478213. The reversal of 3447478157 is 7518747443.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7518747443 = 2467 ⋅3047729.

It can be written as a sum of positive squares in 2 ways, for example, as 2378122756 + 1069355401 = 48766^2 + 32701^2 .

It is a cyclic number.

It is not a de Polignac number, because 3447478157 - 2¹² = 3447474061 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 (3447408157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29432 + ... + 88097.

It is an arithmetic number, because the mean of its divisors is an integer number (861906255).

Almost surely, 2^3447478157 is an apocalyptic number.

It is an amenable number.

3447478157 is a deficient number, since it is larger than the sum of its proper divisors (146863).

3447478157 is a wasteful number, since it uses less digits than its factorization.

3447478157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146862.

The product of its digits is 2634240, while the sum is 50.

The square root of 3447478157 is about 58715.2293446939. The cubic root of 3447478157 is about 1510.6615461582.

The spelling of 3447478157 in words is "three billion, four hundred forty-seven million, four hundred seventy-eight thousand, one hundred fifty-seven".