10505392987 has 2 divisors, whose sum is σ = 10505392988. Its totient is φ = 10505392986.

The previous prime is 10505392979. The next prime is 10505393023. The reversal of 10505392987 is 78929350501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10505392987 - 2³ = 10505392979 is a prime.

It is a super-2 number, since 2×10505392987² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10505392987.

It is not a weakly prime, because it can be changed into another prime (10505395987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252696493 + 5252696494.

It is an arithmetic number, because the mean of its divisors is an integer number (5252696494).

Almost surely, 2^10505392987 is an apocalyptic number.

10505392987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10505392987 is an equidigital number, since it uses as much as digits as its factorization.

10505392987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 10505392987 in words is "ten billion, five hundred five million, three hundred ninety-two thousand, nine hundred eighty-seven".