91023071494 has 8 divisors (see below), whose sum is σ = 136538579808. Its totient is φ = 45510211560.

The previous prime is 91023071467. The next prime is 91023071497. The reversal of 91023071494 is 49417032019.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91023071497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573817 + ... + 715060.

It is an arithmetic number, because the mean of its divisors is an integer number (17067322476).

Almost surely, 2^91023071494 is an apocalyptic number.

91023071494 is a deficient number, since it is larger than the sum of its proper divisors (45515508314).

91023071494 is a wasteful number, since it uses less digits than its factorization.

91023071494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324190.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 91023071494 in words is "ninety-one billion, twenty-three million, seventy-one thousand, four hundred ninety-four".