971201780 has 12 divisors (see below), whose sum is σ = 2039523780. Its totient is φ = 388480704.

The previous prime is 971201713. The next prime is 971201797. The reversal of 971201780 is 87102179.

It can be written as a sum of positive squares in 2 ways, for example, as 148888804 + 822312976 = 12202^2 + 28676^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 971201780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24280025 + ... + 24280064.

It is an arithmetic number, because the mean of its divisors is an integer number (169960315).

Almost surely, 2^971201780 is an apocalyptic number.

It is an amenable number.

971201780 is an abundant number, since it is smaller than the sum of its proper divisors (1068322000).

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

971201780 is a wasteful number, since it uses less digits than its factorization.

971201780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48560098 (or 48560096 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 971201780 is about 31164.1104477570. The cubic root of 971201780 is about 990.3069415224.

The spelling of 971201780 in words is "nine hundred seventy-one million, two hundred one thousand, seven hundred eighty".