203212451989 has 2 divisors, whose sum is σ = 203212451990. Its totient is φ = 203212451988.

The previous prime is 203212451927. The next prime is 203212452109. The reversal of 203212451989 is 989154212302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191333631889 + 11878820100 = 437417^2 + 108990^2 .

It is a cyclic number.

It is not a de Polignac number, because 203212451989 - 2¹⁷ = 203212320917 is a prime.

It is a super-2 number, since 2×203212451989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203212451389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101606225994 + 101606225995.

It is an arithmetic number, because the mean of its divisors is an integer number (101606225995).

Almost surely, 2^203212451989 is an apocalyptic number.

It is an amenable number.

203212451989 is a deficient number, since it is larger than the sum of its proper divisors (1).

203212451989 is an equidigital number, since it uses as much as digits as its factorization.

203212451989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 203212451989 in words is "two hundred three billion, two hundred twelve million, four hundred fifty-one thousand, nine hundred eighty-nine".