197371387 has 2 divisors, whose sum is σ = 197371388. Its totient is φ = 197371386.

The previous prime is 197371331. The next prime is 197371393. The reversal of 197371387 is 783173791.

It is a strong prime.

It is an emirp because it is prime and its reverse (783173791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197371387 - 2¹⁵ = 197338619 is a prime.

It is not a weakly prime, because it can be changed into another prime (197371687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98685693 + 98685694.

It is an arithmetic number, because the mean of its divisors is an integer number (98685694).

Almost surely, 2^197371387 is an apocalyptic number.

197371387 is a deficient number, since it is larger than the sum of its proper divisors (1).

197371387 is an equidigital number, since it uses as much as digits as its factorization.

197371387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 46.

The square root of 197371387 is about 14048.8927321693. The cubic root of 197371387 is about 582.2302036080.

The spelling of 197371387 in words is "one hundred ninety-seven million, three hundred seventy-one thousand, three hundred eighty-seven".