1964397047 has 2 divisors, whose sum is σ = 1964397048. Its totient is φ = 1964397046.

The previous prime is 1964396999. The next prime is 1964397059. The reversal of 1964397047 is 7407934691.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1964397047 - 2²⁴ = 1947619831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1964396986 and 1964397004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964390047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982198523 + 982198524.

It is an arithmetic number, because the mean of its divisors is an integer number (982198524).

Almost surely, 2^1964397047 is an apocalyptic number.

1964397047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964397047 is an equidigital number, since it uses as much as digits as its factorization.

1964397047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 1964397047 is about 44321.5190060088. The cubic root of 1964397047 is about 1252.4000920570.

The spelling of 1964397047 in words is "one billion, nine hundred sixty-four million, three hundred ninety-seven thousand, forty-seven".