1982471761 has 4 divisors (see below), whose sum is σ = 2086812400. Its totient is φ = 1878131124.

The previous prime is 1982471737. The next prime is 1982471809. The reversal of 1982471761 is 1671742891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982471761 is a prime.

It is a super-2 number, since 2×1982471761² = 7860388566324882242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1982471261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52170291 + ... + 52170328.

It is an arithmetic number, because the mean of its divisors is an integer number (521703100).

Almost surely, 2^1982471761 is an apocalyptic number.

It is an amenable number.

1982471761 is a deficient number, since it is larger than the sum of its proper divisors (104340639).

1982471761 is a wasteful number, since it uses less digits than its factorization.

1982471761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104340638.

The product of its digits is 169344, while the sum is 46.

The square root of 1982471761 is about 44524.9566086257. The cubic root of 1982471761 is about 1256.2295449884.

The spelling of 1982471761 in words is "one billion, nine hundred eighty-two million, four hundred seventy-one thousand, seven hundred sixty-one".