1652585981 has 2 divisors, whose sum is σ = 1652585982. Its totient is φ = 1652585980.

The previous prime is 1652585947. The next prime is 1652585999. The reversal of 1652585981 is 1895852561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1606807225 + 45778756 = 40085^2 + 6766^2 .

It is an emirp because it is prime and its reverse (1895852561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1652585981 - 2¹⁰ = 1652584957 is a prime.

It is a super-2 number, since 2×1652585981² = 5462080849195464722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1652585381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826292990 + 826292991.

It is an arithmetic number, because the mean of its divisors is an integer number (826292991).

Almost surely, 2^1652585981 is an apocalyptic number.

It is an amenable number.

1652585981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1652585981 is an equidigital number, since it uses as much as digits as its factorization.

1652585981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864000, while the sum is 50.

The square root of 1652585981 is about 40652.0107866757. The cubic root of 1652585981 is about 1182.2827545430.

The spelling of 1652585981 in words is "one billion, six hundred fifty-two million, five hundred eighty-five thousand, nine hundred eighty-one".