2487313981 has 2 divisors, whose sum is σ = 2487313982. Its totient is φ = 2487313980.

The previous prime is 2487313949. The next prime is 2487313991. The reversal of 2487313981 is 1893137842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2456788356 + 30525625 = 49566^2 + 5525^2 .

It is a cyclic number.

It is not a de Polignac number, because 2487313981 - 2⁵ = 2487313949 is a prime.

It is a super-2 number, since 2×2487313981² = 12373461680156136722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2487313991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1243656990 + 1243656991.

It is an arithmetic number, because the mean of its divisors is an integer number (1243656991).

Almost surely, 2^2487313981 is an apocalyptic number.

It is an amenable number.

2487313981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2487313981 is an equidigital number, since it uses as much as digits as its factorization.

2487313981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 2487313981 is about 49872.9784652972. The cubic root of 2487313981 is about 1354.9092373495.

The spelling of 2487313981 in words is "two billion, four hundred eighty-seven million, three hundred thirteen thousand, nine hundred eighty-one".