83887557 has 16 divisors (see below), whose sum is σ = 122498880. Its totient is φ = 50746752.

The previous prime is 83887541. The next prime is 83887561. The reversal of 83887557 is 75578838.

It is not a de Polignac number, because 83887557 - 2⁴ = 83887541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83887577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15928 + ... + 20529.

It is an arithmetic number, because the mean of its divisors is an integer number (7656180).

Almost surely, 2^83887557 is an apocalyptic number.

It is an amenable number.

83887557 is a deficient number, since it is larger than the sum of its proper divisors (38611323).

83887557 is a wasteful number, since it uses less digits than its factorization.

83887557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36532.

The product of its digits is 1881600, while the sum is 51.

The square root of 83887557 is about 9159.0150671347. The cubic root of 83887557 is about 437.7564115424.

The spelling of 83887557 in words is "eighty-three million, eight hundred eighty-seven thousand, five hundred fifty-seven".