91047299946 has 8 divisors (see below), whose sum is σ = 182094599904. Its totient is φ = 30349099980.

The previous prime is 91047299923. The next prime is 91047299947. The reversal of 91047299946 is 64999274019.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

91047299946 is an admirable number.

It is a super-2 number, since 2×91047299946² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91047299946.

It is not an unprimeable number, because it can be changed into a prime (91047299947) 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, 7587274990 + ... + 7587275001.

It is an arithmetic number, because the mean of its divisors is an integer number (22761824988).

Almost surely, 2^91047299946 is an apocalyptic number.

91047299946 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91047299946 is a wasteful number, since it uses less digits than its factorization.

91047299946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15174549996.

The product of its (nonzero) digits is 8817984, while the sum is 60.

The spelling of 91047299946 in words is "ninety-one billion, forty-seven million, two hundred ninety-nine thousand, nine hundred forty-six".