2487661993 has 2 divisors, whose sum is σ = 2487661994. Its totient is φ = 2487661992.

The previous prime is 2487661951. The next prime is 2487661999. The reversal of 2487661993 is 3991667842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2028331369 + 459330624 = 45037^2 + 21432^2 .

It is a cyclic number.

It is not a de Polignac number, because 2487661993 - 2¹³ = 2487653801 is a prime.

It is not a weakly prime, because it can be changed into another prime (2487661999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1243830996 + 1243830997.

It is an arithmetic number, because the mean of its divisors is an integer number (1243830997).

Almost surely, 2^2487661993 is an apocalyptic number.

It is an amenable number.

2487661993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2487661993 is an equidigital number, since it uses as much as digits as its factorization.

2487661993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 55.

The square root of 2487661993 is about 49876.4673267865. The cubic root of 2487661993 is about 1354.9724250140.

The spelling of 2487661993 in words is "two billion, four hundred eighty-seven million, six hundred sixty-one thousand, nine hundred ninety-three".