32890813 has 2 divisors, whose sum is σ = 32890814. Its totient is φ = 32890812.

The previous prime is 32890799. The next prime is 32890831. The reversal of 32890813 is 31809823.

Together with next prime (32890831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17665209 + 15225604 = 4203^2 + 3902^2 .

It is a cyclic number.

It is not a de Polignac number, because 32890813 - 2¹³ = 32882621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32890853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16445406 + 16445407.

It is an arithmetic number, because the mean of its divisors is an integer number (16445407).

Almost surely, 2^32890813 is an apocalyptic number.

It is an amenable number.

32890813 is a deficient number, since it is larger than the sum of its proper divisors (1).

32890813 is an equidigital number, since it uses as much as digits as its factorization.

32890813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 32890813 is about 5735.0512639383. The cubic root of 32890813 is about 320.3992834835.

The spelling of 32890813 in words is "thirty-two million, eight hundred ninety thousand, eight hundred thirteen".