197315387 has 2 divisors, whose sum is σ = 197315388. Its totient is φ = 197315386.

The previous prime is 197315381. The next prime is 197315401. The reversal of 197315387 is 783513791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197315387 - 2¹² = 197311291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197315381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98657693 + 98657694.

It is an arithmetic number, because the mean of its divisors is an integer number (98657694).

Almost surely, 2^197315387 is an apocalyptic number.

197315387 is a deficient number, since it is larger than the sum of its proper divisors (1).

197315387 is an equidigital number, since it uses as much as digits as its factorization.

197315387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 197315387 is about 14046.8995511465. The cubic root of 197315387 is about 582.1751331880.

The spelling of 197315387 in words is "one hundred ninety-seven million, three hundred fifteen thousand, three hundred eighty-seven".