6410023981 has 2 divisors, whose sum is σ = 6410023982. Its totient is φ = 6410023980.

The previous prime is 6410023973. The next prime is 6410023987. The reversal of 6410023981 is 1893200146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4642241956 + 1767782025 = 68134^2 + 42045^2 .

It is a cyclic number.

It is not a de Polignac number, because 6410023981 - 2³ = 6410023973 is a prime.

It is a super-2 number, since 2×6410023981² = 82176814873990176722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6410023987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205011990 + 3205011991.

It is an arithmetic number, because the mean of its divisors is an integer number (3205011991).

Almost surely, 2^6410023981 is an apocalyptic number.

It is an amenable number.

6410023981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6410023981 is an equidigital number, since it uses as much as digits as its factorization.

6410023981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6410023981 is about 80062.6253691446. The cubic root of 6410023981 is about 1857.6043444527.

The spelling of 6410023981 in words is "six billion, four hundred ten million, twenty-three thousand, nine hundred eighty-one".