69931993 has 2 divisors, whose sum is σ = 69931994. Its totient is φ = 69931992.

The previous prime is 69931991. The next prime is 69932003. The reversal of 69931993 is 39913996.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62047129 + 7884864 = 7877^2 + 2808^2 .

It is a cyclic number.

It is not a de Polignac number, because 69931993 - 2¹ = 69931991 is a prime.

Together with 69931991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (69931991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34965996 + 34965997.

It is an arithmetic number, because the mean of its divisors is an integer number (34965997).

Almost surely, 2^69931993 is an apocalyptic number.

It is an amenable number.

69931993 is a deficient number, since it is larger than the sum of its proper divisors (1).

69931993 is an equidigital number, since it uses as much as digits as its factorization.

69931993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 354294, while the sum is 49.

The square root of 69931993 is about 8362.5350821387. The cubic root of 69931993 is about 411.9950218552.

The spelling of 69931993 in words is "sixty-nine million, nine hundred thirty-one thousand, nine hundred ninety-three".