69406983491 has 4 divisors (see below), whose sum is σ = 69501673152. Its totient is φ = 69312293832.

The previous prime is 69406983439. The next prime is 69406983493. The reversal of 69406983491 is 19438960496.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69406983491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69406983491.

It is not an unprimeable number, because it can be changed into a prime (69406983493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47343731 + ... + 47345196.

It is an arithmetic number, because the mean of its divisors is an integer number (17375418288).

Almost surely, 2^69406983491 is an apocalyptic number.

69406983491 is a deficient number, since it is larger than the sum of its proper divisors (94689661).

69406983491 is an equidigital number, since it uses as much as digits as its factorization.

69406983491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94689660.

The product of its (nonzero) digits is 10077696, while the sum is 59.

The spelling of 69406983491 in words is "sixty-nine billion, four hundred six million, nine hundred eighty-three thousand, four hundred ninety-one".