83761621 has 2 divisors, whose sum is σ = 83761622. Its totient is φ = 83761620.

The previous prime is 83761609. The next prime is 83761627. The reversal of 83761621 is 12616738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45495025 + 38266596 = 6745^2 + 6186^2 .

It is a cyclic number.

It is not a de Polignac number, because 83761621 - 2¹¹ = 83759573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83761627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41880810 + 41880811.

It is an arithmetic number, because the mean of its divisors is an integer number (41880811).

Almost surely, 2^83761621 is an apocalyptic number.

It is an amenable number.

83761621 is a deficient number, since it is larger than the sum of its proper divisors (1).

83761621 is an equidigital number, since it uses as much as digits as its factorization.

83761621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 83761621 is about 9152.1375098935. The cubic root of 83761621 is about 437.5372415645.

The spelling of 83761621 in words is "eighty-three million, seven hundred sixty-one thousand, six hundred twenty-one".