202129997 has 2 divisors, whose sum is σ = 202129998. Its totient is φ = 202129996.

The previous prime is 202129979. The next prime is 202130011. The reversal of 202129997 is 799921202.

Together with previous prime (202129979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175854121 + 26275876 = 13261^2 + 5126^2 .

It is a cyclic number.

It is not a de Polignac number, because 202129997 - 2⁶ = 202129933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202129097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101064998 + 101064999.

It is an arithmetic number, because the mean of its divisors is an integer number (101064999).

Almost surely, 2^202129997 is an apocalyptic number.

It is an amenable number.

202129997 is a deficient number, since it is larger than the sum of its proper divisors (1).

202129997 is an equidigital number, since it uses as much as digits as its factorization.

202129997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 202129997 is about 14217.2429465069. The cubic root of 202129997 is about 586.8722706451.

The spelling of 202129997 in words is "two hundred two million, one hundred twenty-nine thousand, nine hundred ninety-seven".