83030921 has 2 divisors, whose sum is σ = 83030922. Its totient is φ = 83030920.

The previous prime is 83030903. The next prime is 83030951. The reversal of 83030921 is 12903038.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53816896 + 29214025 = 7336^2 + 5405^2 .

It is a cyclic number.

It is not a de Polignac number, because 83030921 - 2¹⁰ = 83029897 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (83030951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41515460 + 41515461.

It is an arithmetic number, because the mean of its divisors is an integer number (41515461).

Almost surely, 2^83030921 is an apocalyptic number.

It is an amenable number.

83030921 is a deficient number, since it is larger than the sum of its proper divisors (1).

83030921 is an equidigital number, since it uses as much as digits as its factorization.

83030921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 83030921 is about 9112.1304314633. The cubic root of 83030921 is about 436.2612289291.

Adding to 83030921 its reverse (12903038), we get a palindrome (95933959).

The spelling of 83030921 in words is "eighty-three million, thirty thousand, nine hundred twenty-one".