1964439247 has 12 divisors (see below), whose sum is σ = 1994644656. Its totient is φ = 1934661120.

The previous prime is 1964439227. The next prime is 1964439283. The reversal of 1964439247 is 7429344691.

It is not a de Polignac number, because 1964439247 - 2¹⁹ = 1963914959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1964439247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964439227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2643558 + ... + 2644300.

It is an arithmetic number, because the mean of its divisors is an integer number (166220388).

Almost surely, 2^1964439247 is an apocalyptic number.

1964439247 is a deficient number, since it is larger than the sum of its proper divisors (30205409).

1964439247 is an frugal number, since it uses more digits than its factorization.

1964439247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218 (or 1121 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 1964439247 is about 44321.9950701680. The cubic root of 1964439247 is about 1252.4090601872.

The spelling of 1964439247 in words is "one billion, nine hundred sixty-four million, four hundred thirty-nine thousand, two hundred forty-seven".