971447904 has 216 divisors, whose sum is σ = 3283429968. Its totient is φ = 277136640.

The previous prime is 971447863. The next prime is 971447933. The reversal of 971447904 is 409744179.

It is a tau number, because it is divible by the number of its divisors (216).

It is a super-2 number, since 2×971447904² = 1887422060371986432, which contains 22 as substring.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 971447904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1469334 + ... + 1469994.

Almost surely, 2^971447904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 971447904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1641714984).

971447904 is an abundant number, since it is smaller than the sum of its proper divisors (2311982064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971447904 is an frugal number, since it uses more digits than its factorization.

971447904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 971447904 is about 31168.0590348517. The cubic root of 971447904 is about 990.3905896801.

The spelling of 971447904 in words is "nine hundred seventy-one million, four hundred forty-seven thousand, nine hundred four".