157878743 has 6 divisors (see below), whose sum is σ = 173536272. Its totient is φ = 143526020.

The previous prime is 157878731. The next prime is 157878751. The reversal of 157878743 is 347878751.

It is a happy number.

157878743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-157878743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157878691 and 157878700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157878713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 652271 + ... + 652512.

It is an arithmetic number, because the mean of its divisors is an integer number (28922712).

Almost surely, 2^157878743 is an apocalyptic number.

157878743 is a deficient number, since it is larger than the sum of its proper divisors (15657529).

157878743 is a wasteful number, since it uses less digits than its factorization.

157878743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304805 (or 1304794 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 50.

The square root of 157878743 is about 12564.9808197227. The cubic root of 157878743 is about 540.4736847309.

The spelling of 157878743 in words is "one hundred fifty-seven million, eight hundred seventy-eight thousand, seven hundred forty-three".