202228993 has 2 divisors, whose sum is σ = 202228994. Its totient is φ = 202228992.

The previous prime is 202228963. The next prime is 202229003. The reversal of 202228993 is 399822202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176544369 + 25684624 = 13287^2 + 5068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202228993 is a prime.

It is not a weakly prime, because it can be changed into another prime (202228963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101114496 + 101114497.

It is an arithmetic number, because the mean of its divisors is an integer number (101114497).

Almost surely, 2^202228993 is an apocalyptic number.

It is an amenable number.

202228993 is a deficient number, since it is larger than the sum of its proper divisors (1).

202228993 is an equidigital number, since it uses as much as digits as its factorization.

202228993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 202228993 is about 14220.7240673603. The cubic root of 202228993 is about 586.9680646489.

The spelling of 202228993 in words is "two hundred two million, two hundred twenty-eight thousand, nine hundred ninety-three".