197512643 has 2 divisors, whose sum is σ = 197512644. Its totient is φ = 197512642.

The previous prime is 197512633. The next prime is 197512673. The reversal of 197512643 is 346215791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197512643 - 2¹² = 197508547 is a prime.

It is a super-2 number, since 2×197512643² = 78022488289690898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197512597 and 197512606.

It is not a weakly prime, because it can be changed into another prime (197512633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98756321 + 98756322.

It is an arithmetic number, because the mean of its divisors is an integer number (98756322).

Almost surely, 2^197512643 is an apocalyptic number.

197512643 is a deficient number, since it is larger than the sum of its proper divisors (1).

197512643 is an equidigital number, since it uses as much as digits as its factorization.

197512643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 197512643 is about 14053.9191331102. The cubic root of 197512643 is about 582.3690685477.

The spelling of 197512643 in words is "one hundred ninety-seven million, five hundred twelve thousand, six hundred forty-three".