83553973 has 2 divisors, whose sum is σ = 83553974. Its totient is φ = 83553972.

The previous prime is 83553947. The next prime is 83553989. The reversal of 83553973 is 37935538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60109009 + 23444964 = 7753^2 + 4842^2 .

It is a cyclic number.

It is not a de Polignac number, because 83553973 - 2⁹ = 83553461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83553913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41776986 + 41776987.

It is an arithmetic number, because the mean of its divisors is an integer number (41776987).

Almost surely, 2^83553973 is an apocalyptic number.

It is an amenable number.

83553973 is a deficient number, since it is larger than the sum of its proper divisors (1).

83553973 is an equidigital number, since it uses as much as digits as its factorization.

83553973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 43.

The square root of 83553973 is about 9140.7862353301. The cubic root of 83553973 is about 437.1753856526.

The spelling of 83553973 in words is "eighty-three million, five hundred fifty-three thousand, nine hundred seventy-three".