1370193989 has 2 divisors, whose sum is σ = 1370193990. Its totient is φ = 1370193988.

The previous prime is 1370193919. The next prime is 1370193991. The reversal of 1370193989 is 9893910731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1343589025 + 26604964 = 36655^2 + 5158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1370193989 - 2¹⁶ = 1370128453 is a prime.

Together with 1370193991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1370193919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685096994 + 685096995.

It is an arithmetic number, because the mean of its divisors is an integer number (685096995).

Almost surely, 2^1370193989 is an apocalyptic number.

It is an amenable number.

1370193989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1370193989 is an equidigital number, since it uses as much as digits as its factorization.

1370193989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 1370193989 is about 37016.1314699416. The cubic root of 1370193989 is about 1110.6929604255.

The spelling of 1370193989 in words is "one billion, three hundred seventy million, one hundred ninety-three thousand, nine hundred eighty-nine".