687850031941 has 2 divisors, whose sum is σ = 687850031942. Its totient is φ = 687850031940.

The previous prime is 687850031909. The next prime is 687850031969. The reversal of 687850031941 is 149130058786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 482705352900 + 205144679041 = 694770^2 + 452929^2 .

It is a cyclic number.

It is not a de Polignac number, because 687850031941 - 2⁵ = 687850031909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687850331941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343925015970 + 343925015971.

It is an arithmetic number, because the mean of its divisors is an integer number (343925015971).

Almost surely, 2^687850031941 is an apocalyptic number.

It is an amenable number.

687850031941 is a deficient number, since it is larger than the sum of its proper divisors (1).

687850031941 is an equidigital number, since it uses as much as digits as its factorization.

687850031941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 687850031941 in words is "six hundred eighty-seven billion, eight hundred fifty million, thirty-one thousand, nine hundred forty-one".