192148991989 has 2 divisors, whose sum is σ = 192148991990. Its totient is φ = 192148991988.

The previous prime is 192148991981. The next prime is 192148992047. The reversal of 192148991989 is 989199841291.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189261541764 + 2887450225 = 435042^2 + 53735^2 .

It is a cyclic number.

It is not a de Polignac number, because 192148991989 - 2³ = 192148991981 is a prime.

It is a super-2 number, since 2×192148991989² (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 (192148991981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96074495994 + 96074495995.

It is an arithmetic number, because the mean of its divisors is an integer number (96074495995).

Almost surely, 2^192148991989 is an apocalyptic number.

It is an amenable number.

192148991989 is a deficient number, since it is larger than the sum of its proper divisors (1).

192148991989 is an equidigital number, since it uses as much as digits as its factorization.

192148991989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30233088, while the sum is 70.

The spelling of 192148991989 in words is "one hundred ninety-two billion, one hundred forty-eight million, nine hundred ninety-one thousand, nine hundred eighty-nine".