83997869 has 2 divisors, whose sum is σ = 83997870. Its totient is φ = 83997868.

The previous prime is 83997847. The next prime is 83997913. The reversal of 83997869 is 96879938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76352644 + 7645225 = 8738^2 + 2765^2 .

It is a cyclic number.

It is not a de Polignac number, because 83997869 - 2¹⁶ = 83932333 is a prime.

It is a super-2 number, since 2×83997869² = 14111283993082322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83993869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41998934 + 41998935.

It is an arithmetic number, because the mean of its divisors is an integer number (41998935).

Almost surely, 2^83997869 is an apocalyptic number.

It is an amenable number.

83997869 is a deficient number, since it is larger than the sum of its proper divisors (1).

83997869 is an equidigital number, since it uses as much as digits as its factorization.

83997869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 83997869 is about 9165.0351335933. The cubic root of 83997869 is about 437.9482104832.

The spelling of 83997869 in words is "eighty-three million, nine hundred ninety-seven thousand, eight hundred sixty-nine".