201958444997 has 2 divisors, whose sum is σ = 201958444998. Its totient is φ = 201958444996.

The previous prime is 201958444949. The next prime is 201958445009. The reversal of 201958444997 is 799444859102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200846489281 + 1111955716 = 448159^2 + 33346^2 .

It is a cyclic number.

It is not a de Polignac number, because 201958444997 - 2¹⁴ = 201958428613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201958444927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100979222498 + 100979222499.

It is an arithmetic number, because the mean of its divisors is an integer number (100979222499).

Almost surely, 2^201958444997 is an apocalyptic number.

It is an amenable number.

201958444997 is a deficient number, since it is larger than the sum of its proper divisors (1).

201958444997 is an equidigital number, since it uses as much as digits as its factorization.

201958444997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 201958444997 in words is "two hundred one billion, nine hundred fifty-eight million, four hundred forty-four thousand, nine hundred ninety-seven".