83641973 has 2 divisors, whose sum is σ = 83641974. Its totient is φ = 83641972.

The previous prime is 83641969. The next prime is 83641981. The reversal of 83641973 is 37914638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83594449 + 47524 = 9143^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 83641973 - 2² = 83641969 is a prime.

It is equal to p_4869365 and since 83641973 and 4869365 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83641973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83641903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41820986 + 41820987.

It is an arithmetic number, because the mean of its divisors is an integer number (41820987).

Almost surely, 2^83641973 is an apocalyptic number.

It is an amenable number.

83641973 is a deficient number, since it is larger than the sum of its proper divisors (1).

83641973 is an equidigital number, since it uses as much as digits as its factorization.

83641973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 83641973 is about 9145.5985588697. The cubic root of 83641973 is about 437.3288111741.

The spelling of 83641973 in words is "eighty-three million, six hundred forty-one thousand, nine hundred seventy-three".