91401434797 has 4 divisors (see below), whose sum is σ = 92899819036. Its totient is φ = 89903050560.

The previous prime is 91401434759. The next prime is 91401434833. The reversal of 91401434797 is 79743410419.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10910638116 + 80490796681 = 104454^2 + 283709^2 .

It is a cyclic number.

It is not a de Polignac number, because 91401434797 - 2⁷ = 91401434669 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 91401434797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91401434737) 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, 749192028 + ... + 749192149.

It is an arithmetic number, because the mean of its divisors is an integer number (23224954759).

Almost surely, 2^91401434797 is an apocalyptic number.

It is an amenable number.

91401434797 is a deficient number, since it is larger than the sum of its proper divisors (1498384239).

91401434797 is a wasteful number, since it uses less digits than its factorization.

91401434797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498384238.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 91401434797 in words is "ninety-one billion, four hundred one million, four hundred thirty-four thousand, seven hundred ninety-seven".