202120979 has 2 divisors, whose sum is σ = 202120980. Its totient is φ = 202120978.

The previous prime is 202120969. The next prime is 202121053. The reversal of 202120979 is 979021202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202120979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (202120969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060489 + 101060490.

It is an arithmetic number, because the mean of its divisors is an integer number (101060490).

Almost surely, 2^202120979 is an apocalyptic number.

202120979 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120979 is an equidigital number, since it uses as much as digits as its factorization.

202120979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 202120979 is about 14216.9257928710. The cubic root of 202120979 is about 586.8635427754.

The spelling of 202120979 in words is "two hundred two million, one hundred twenty thousand, nine hundred seventy-nine".