49691679997 has 2 divisors, whose sum is σ = 49691679998. Its totient is φ = 49691679996.

The previous prime is 49691679971. The next prime is 49691680019. The reversal of 49691679997 is 79997619694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38426192676 + 11265487321 = 196026^2 + 106139^2 .

It is a cyclic number.

It is not a de Polignac number, because 49691679997 - 2³⁵ = 15331941629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49691679197) 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, 24845839998 + 24845839999.

It is an arithmetic number, because the mean of its divisors is an integer number (24845839999).

Almost surely, 2^49691679997 is an apocalyptic number.

It is an amenable number.

49691679997 is a deficient number, since it is larger than the sum of its proper divisors (1).

49691679997 is an equidigital number, since it uses as much as digits as its factorization.

49691679997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 416649744, while the sum is 76.

The spelling of 49691679997 in words is "forty-nine billion, six hundred ninety-one million, six hundred seventy-nine thousand, nine hundred ninety-seven".