1947713947 has 2 divisors, whose sum is σ = 1947713948. Its totient is φ = 1947713946.

The previous prime is 1947713941. The next prime is 1947713951. The reversal of 1947713947 is 7493177491.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1947713947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1947713894 and 1947713903.

It is not a weakly prime, because it can be changed into another prime (1947713941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973856973 + 973856974.

It is an arithmetic number, because the mean of its divisors is an integer number (973856974).

Almost surely, 2^1947713947 is an apocalyptic number.

1947713947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947713947 is an equidigital number, since it uses as much as digits as its factorization.

1947713947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 52.

The square root of 1947713947 is about 44132.9122877700. The cubic root of 1947713947 is about 1248.8445743490.

The spelling of 1947713947 in words is "one billion, nine hundred forty-seven million, seven hundred thirteen thousand, nine hundred forty-seven".