987731859407 has 2 divisors, whose sum is σ = 987731859408. Its totient is φ = 987731859406.

The previous prime is 987731859371. The next prime is 987731859449. The reversal of 987731859407 is 704958137789.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 987731859407 - 2⁸ = 987731859151 is a prime.

It is a super-2 number, since 2×987731859407² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987731859307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493865929703 + 493865929704.

It is an arithmetic number, because the mean of its divisors is an integer number (493865929704).

Almost surely, 2^987731859407 is an apocalyptic number.

987731859407 is a deficient number, since it is larger than the sum of its proper divisors (1).

987731859407 is an equidigital number, since it uses as much as digits as its factorization.

987731859407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 106686720, while the sum is 68.

The spelling of 987731859407 in words is "nine hundred eighty-seven billion, seven hundred thirty-one million, eight hundred fifty-nine thousand, four hundred seven".