202145849 has 2 divisors, whose sum is σ = 202145850. Its totient is φ = 202145848.

The previous prime is 202145809. The next prime is 202145851. The reversal of 202145849 is 948541202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136422400 + 65723449 = 11680^2 + 8107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202145849 is a prime.

Together with 202145851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (202145809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101072924 + 101072925.

It is an arithmetic number, because the mean of its divisors is an integer number (101072925).

Almost surely, 2^202145849 is an apocalyptic number.

It is an amenable number.

202145849 is a deficient number, since it is larger than the sum of its proper divisors (1).

202145849 is an equidigital number, since it uses as much as digits as its factorization.

202145849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 202145849 is about 14217.8004276330. The cubic root of 202145849 is about 586.8876120198.

The spelling of 202145849 in words is "two hundred two million, one hundred forty-five thousand, eight hundred forty-nine".