83976857 has 4 divisors (see below), whose sum is σ = 85561380. Its totient is φ = 82392336.

The previous prime is 83976853. The next prime is 83976863. The reversal of 83976857 is 75867938.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37994896 + 45981961 = 6164^2 + 6781^2 .

It is a cyclic number.

It is not a de Polignac number, because 83976857 - 2² = 83976853 is a prime.

It is a super-2 number, since 2×83976857² = 14104225023196898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 1584469 = 83976857 / (8 + 3 + 9 + 7 + 6 + 8 + 5 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83976799 and 83976808.

It is not an unprimeable number, because it can be changed into a prime (83976853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792182 + ... + 792287.

It is an arithmetic number, because the mean of its divisors is an integer number (21390345).

Almost surely, 2^83976857 is an apocalyptic number.

It is an amenable number.

83976857 is a deficient number, since it is larger than the sum of its proper divisors (1584523).

83976857 is a wasteful number, since it uses less digits than its factorization.

83976857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584522.

The product of its digits is 2540160, while the sum is 53.

The square root of 83976857 is about 9163.8887487791. Note that the first 3 decimals coincide. The cubic root of 83976857 is about 437.9116899725.

The spelling of 83976857 in words is "eighty-three million, nine hundred seventy-six thousand, eight hundred fifty-seven".