10420697491 has 2 divisors, whose sum is σ = 10420697492. Its totient is φ = 10420697490.

The previous prime is 10420697453. The next prime is 10420697509. The reversal of 10420697491 is 19479602401.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10420697491 is a prime.

It is not a weakly prime, because it can be changed into another prime (10420697291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210348745 + 5210348746.

It is an arithmetic number, because the mean of its divisors is an integer number (5210348746).

Almost surely, 2^10420697491 is an apocalyptic number.

10420697491 is a deficient number, since it is larger than the sum of its proper divisors (1).

10420697491 is an equidigital number, since it uses as much as digits as its factorization.

10420697491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 10420697491 in words is "ten billion, four hundred twenty million, six hundred ninety-seven thousand, four hundred ninety-one".