1974195647 has 2 divisors, whose sum is σ = 1974195648. Its totient is φ = 1974195646.

The previous prime is 1974195631. The next prime is 1974195659. The reversal of 1974195647 is 7465914791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1974195647 - 2⁴ = 1974195631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974195697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987097823 + 987097824.

It is an arithmetic number, because the mean of its divisors is an integer number (987097824).

Almost surely, 2^1974195647 is an apocalyptic number.

1974195647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974195647 is an equidigital number, since it uses as much as digits as its factorization.

1974195647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 1974195647 is about 44431.9214866969. The cubic root of 1974195647 is about 1254.4790030164.

The spelling of 1974195647 in words is "one billion, nine hundred seventy-four million, one hundred ninety-five thousand, six hundred forty-seven".