201989031719 has 2 divisors, whose sum is σ = 201989031720. Its totient is φ = 201989031718.

The previous prime is 201989031707. The next prime is 201989031763. The reversal of 201989031719 is 917130989102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201989031719 is a prime.

It is a super-2 number, since 2×201989031719² (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 (201989031779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100994515859 + 100994515860.

It is an arithmetic number, because the mean of its divisors is an integer number (100994515860).

Almost surely, 2^201989031719 is an apocalyptic number.

201989031719 is a deficient number, since it is larger than the sum of its proper divisors (1).

201989031719 is an equidigital number, since it uses as much as digits as its factorization.

201989031719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 50.

The spelling of 201989031719 in words is "two hundred one billion, nine hundred eighty-nine million, thirty-one thousand, seven hundred nineteen".