202919993 has 2 divisors, whose sum is σ = 202919994. Its totient is φ = 202919992.

The previous prime is 202919963. The next prime is 202920001. The reversal of 202919993 is 399919202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185722384 + 17197609 = 13628^2 + 4147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202919993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (202919923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101459996 + 101459997.

It is an arithmetic number, because the mean of its divisors is an integer number (101459997).

Almost surely, 2^202919993 is an apocalyptic number.

It is an amenable number.

202919993 is a deficient number, since it is larger than the sum of its proper divisors (1).

202919993 is an equidigital number, since it uses as much as digits as its factorization.

202919993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 202919993 is about 14244.9988767988. The cubic root of 202919993 is about 587.6358453332.

It can be divided in two parts, 2029 and 19993, that added together give a palindrome (22022).

The spelling of 202919993 in words is "two hundred two million, nine hundred nineteen thousand, nine hundred ninety-three".