402202993 has 2 divisors, whose sum is σ = 402202994. Its totient is φ = 402202992.

The previous prime is 402202981. The next prime is 402203003. The reversal of 402202993 is 399202204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241243024 + 160959969 = 15532^2 + 12687^2 .

It is a cyclic number.

It is not a de Polignac number, because 402202993 - 2¹³ = 402194801 is a prime.

It is not a weakly prime, because it can be changed into another prime (402202903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201101496 + 201101497.

It is an arithmetic number, because the mean of its divisors is an integer number (201101497).

Almost surely, 2^402202993 is an apocalyptic number.

It is an amenable number.

402202993 is a deficient number, since it is larger than the sum of its proper divisors (1).

402202993 is an equidigital number, since it uses as much as digits as its factorization.

402202993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 402202993 is about 20054.9992021940. Note that the first 3 decimals coincide. The cubic root of 402202993 is about 738.1564733348.

The spelling of 402202993 in words is "four hundred two million, two hundred two thousand, nine hundred ninety-three".