197972051 has 2 divisors, whose sum is σ = 197972052. Its totient is φ = 197972050.

The previous prime is 197972003. The next prime is 197972059. The reversal of 197972051 is 150279791.

It is a happy number.

197972051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (150279791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197972051 is a prime.

It is not a weakly prime, because it can be changed into another prime (197972059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98986025 + 98986026.

It is an arithmetic number, because the mean of its divisors is an integer number (98986026).

Almost surely, 2^197972051 is an apocalyptic number.

197972051 is a deficient number, since it is larger than the sum of its proper divisors (1).

197972051 is an equidigital number, since it uses as much as digits as its factorization.

197972051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 197972051 is about 14070.2541199511. The cubic root of 197972051 is about 582.8202427763.

The spelling of 197972051 in words is "one hundred ninety-seven million, nine hundred seventy-two thousand, fifty-one".