83986957 has 4 divisors (see below), whose sum is σ = 84006076. Its totient is φ = 83967840.

The previous prime is 83986951. The next prime is 83986963. The reversal of 83986957 is 75968938.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (83986951) and next prime (83986963).

It can be written as a sum of positive squares in 2 ways, for example, as 32878756 + 51108201 = 5734^2 + 7149^2 .

It is a cyclic number.

It is not a de Polignac number, because 83986957 - 2³ = 83986949 is a prime.

It is a super-2 number, since 2×83986957² = 14107617892239698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83986898 and 83986907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83986951) 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, 703 + ... + 12979.

It is an arithmetic number, because the mean of its divisors is an integer number (21001519).

Almost surely, 2^83986957 is an apocalyptic number.

It is an amenable number.

83986957 is a deficient number, since it is larger than the sum of its proper divisors (19119).

83986957 is a wasteful number, since it uses less digits than its factorization.

83986957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19118.

The product of its digits is 3265920, while the sum is 55.

The square root of 83986957 is about 9164.4398083025. The cubic root of 83986957 is about 437.9292453281.

The spelling of 83986957 in words is "eighty-three million, nine hundred eighty-six thousand, nine hundred fifty-seven".