83616391 has 2 divisors, whose sum is σ = 83616392. Its totient is φ = 83616390.

The previous prime is 83616371. The next prime is 83616409. The reversal of 83616391 is 19361638.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83616391 - 2¹³ = 83608199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83616391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83616311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41808195 + 41808196.

It is an arithmetic number, because the mean of its divisors is an integer number (41808196).

Almost surely, 2^83616391 is an apocalyptic number.

83616391 is a deficient number, since it is larger than the sum of its proper divisors (1).

83616391 is an equidigital number, since it uses as much as digits as its factorization.

83616391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 83616391 is about 9144.1998556462. The cubic root of 83616391 is about 437.2842207768.

The spelling of 83616391 in words is "eighty-three million, six hundred sixteen thousand, three hundred ninety-one".