83157487 has 4 divisors (see below), whose sum is σ = 95037136. Its totient is φ = 71277840.

The previous prime is 83157449. The next prime is 83157497. The reversal of 83157487 is 78475138.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83157487 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 (83157497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5939814 + ... + 5939827.

It is an arithmetic number, because the mean of its divisors is an integer number (23759284).

Almost surely, 2^83157487 is an apocalyptic number.

83157487 is a deficient number, since it is larger than the sum of its proper divisors (11879649).

83157487 is a wasteful number, since it uses less digits than its factorization.

83157487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11879648.

The product of its digits is 188160, while the sum is 43.

The square root of 83157487 is about 9119.0727050507. The cubic root of 83157487 is about 436.4827841689.

The spelling of 83157487 in words is "eighty-three million, one hundred fifty-seven thousand, four hundred eighty-seven".