1971763461 has 12 divisors (see below), whose sum is σ = 2850800940. Its totient is φ = 1313263680.

The previous prime is 1971763459. The next prime is 1971763477. The reversal of 1971763461 is 1643671791.

1971763461 is a `hidden beast` number, since 1 + 9 + 7 + 1 + 7 + 634 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1491890625 + 479872836 = 38625^2 + 21906^2 .

It is not a de Polignac number, because 1971763461 - 2¹ = 1971763459 is a prime.

It is a super-2 number, since 2×1971763461² = 7775702292269397042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971763061) 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, 93696 + ... + 112793.

It is an arithmetic number, because the mean of its divisors is an integer number (237566745).

Almost surely, 2^1971763461 is an apocalyptic number.

It is an amenable number.

1971763461 is a deficient number, since it is larger than the sum of its proper divisors (879037479).

1971763461 is a wasteful number, since it uses less digits than its factorization.

1971763461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207556 (or 207553 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 1971763461 is about 44404.5432472850. The cubic root of 1971763461 is about 1253.9636234802.

The spelling of 1971763461 in words is "one billion, nine hundred seventy-one million, seven hundred sixty-three thousand, four hundred sixty-one".