83817761 has 2 divisors, whose sum is σ = 83817762. Its totient is φ = 83817760.

The previous prime is 83817757. The next prime is 83817763. The reversal of 83817761 is 16771838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53567761 + 30250000 = 7319^2 + 5500^2 .

It is a cyclic number.

It is not a de Polignac number, because 83817761 - 2² = 83817757 is a prime.

Together with 83817763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83817763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41908880 + 41908881.

It is an arithmetic number, because the mean of its divisors is an integer number (41908881).

Almost surely, 2^83817761 is an apocalyptic number.

It is an amenable number.

83817761 is a deficient number, since it is larger than the sum of its proper divisors (1).

83817761 is an equidigital number, since it uses as much as digits as its factorization.

83817761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 83817761 is about 9155.2040392336. The cubic root of 83817761 is about 437.6349707104.

The spelling of 83817761 in words is "eighty-three million, eight hundred seventeen thousand, seven hundred sixty-one".