83373721 has 2 divisors, whose sum is σ = 83373722. Its totient is φ = 83373720.

The previous prime is 83373713. The next prime is 83373727. The reversal of 83373721 is 12737338.

83373721 is nontrivially palindromic in base 14.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57760000 + 25613721 = 7600^2 + 5061^2 .

It is a cyclic number.

It is not a de Polignac number, because 83373721 - 2³ = 83373713 is a prime.

It is not a weakly prime, because it can be changed into another prime (83373727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41686860 + 41686861.

It is an arithmetic number, because the mean of its divisors is an integer number (41686861).

Almost surely, 2^83373721 is an apocalyptic number.

It is an amenable number.

83373721 is a deficient number, since it is larger than the sum of its proper divisors (1).

83373721 is an equidigital number, since it uses as much as digits as its factorization.

83373721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 83373721 is about 9130.9211473980. The cubic root of 83373721 is about 436.8607847248.

The spelling of 83373721 in words is "eighty-three million, three hundred seventy-three thousand, seven hundred twenty-one".