999962694781 has 2 divisors, whose sum is σ = 999962694782. Its totient is φ = 999962694780.

The previous prime is 999962694763. The next prime is 999962694791. The reversal of 999962694781 is 187496269999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 989808101881 + 10154592900 = 994891^2 + 100770^2 .

It is a cyclic number.

It is not a de Polignac number, because 999962694781 - 2¹³ = 999962686589 is a prime.

It is a super-2 number, since 2×999962694781² (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 (999962694791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499981347390 + 499981347391.

It is an arithmetic number, because the mean of its divisors is an integer number (499981347391).

Almost surely, 2^999962694781 is an apocalyptic number.

999962694781 is the 577340-th hex number.

It is an amenable number.

999962694781 is a deficient number, since it is larger than the sum of its proper divisors (1).

999962694781 is an equidigital number, since it uses as much as digits as its factorization.

999962694781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952342272, while the sum is 79.

The spelling of 999962694781 in words is "nine hundred ninety-nine billion, nine hundred sixty-two million, six hundred ninety-four thousand, seven hundred eighty-one".