157973845 has 4 divisors (see below), whose sum is σ = 189568620. Its totient is φ = 126379072.

The previous prime is 157973833. The next prime is 157973863. The reversal of 157973845 is 548379751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548379751 = 373 ⋅1470187.

It can be written as a sum of positive squares in 2 ways, for example, as 22344529 + 135629316 = 4727^2 + 11646^2 .

It is a cyclic number.

It is not a de Polignac number, because 157973845 - 2¹³ = 157965653 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15797380 + ... + 15797389.

It is an arithmetic number, because the mean of its divisors is an integer number (47392155).

Almost surely, 2^157973845 is an apocalyptic number.

It is an amenable number.

157973845 is a deficient number, since it is larger than the sum of its proper divisors (31594775).

157973845 is an equidigital number, since it uses as much as digits as its factorization.

157973845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31594774.

The product of its digits is 1058400, while the sum is 49.

The square root of 157973845 is about 12568.7646568786. The cubic root of 157973845 is about 540.5821853227.

The spelling of 157973845 in words is "one hundred fifty-seven million, nine hundred seventy-three thousand, eight hundred forty-five".