197253487 has 2 divisors, whose sum is σ = 197253488. Its totient is φ = 197253486.

The previous prime is 197253481. The next prime is 197253491. The reversal of 197253487 is 784352791.

It is a strong prime.

It is an emirp because it is prime and its reverse (784352791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197253487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197253481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98626743 + 98626744.

It is an arithmetic number, because the mean of its divisors is an integer number (98626744).

Almost surely, 2^197253487 is an apocalyptic number.

197253487 is a deficient number, since it is larger than the sum of its proper divisors (1).

197253487 is an equidigital number, since it uses as much as digits as its factorization.

197253487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 46.

The square root of 197253487 is about 14044.6960451268. The cubic root of 197253487 is about 582.1142485804.

The spelling of 197253487 in words is "one hundred ninety-seven million, two hundred fifty-three thousand, four hundred eighty-seven".