157878497 has 8 divisors (see below), whose sum is σ = 180519552. Its totient is φ = 135259200.

The previous prime is 157878491. The next prime is 157878529. The reversal of 157878497 is 794878751.

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 157878497 - 2¹⁴ = 157862113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157878491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15497 + ... + 23577.

It is an arithmetic number, because the mean of its divisors is an integer number (22564944).

Almost surely, 2^157878497 is an apocalyptic number.

It is an amenable number.

157878497 is a deficient number, since it is larger than the sum of its proper divisors (22641055).

157878497 is an equidigital number, since it uses as much as digits as its factorization.

157878497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10879.

The product of its digits is 3951360, while the sum is 56.

The square root of 157878497 is about 12564.9710306073. The cubic root of 157878497 is about 540.4734040163.

The spelling of 157878497 in words is "one hundred fifty-seven million, eight hundred seventy-eight thousand, four hundred ninety-seven".