91072742 has 8 divisors (see below), whose sum is σ = 136657632. Its totient is φ = 45520200.

The previous prime is 91072741. The next prime is 91072747. The reversal of 91072742 is 24727019.

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

It is a junction number, because it is equal to n+sod(n) for n = 91072699 and 91072708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91072741) 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, 992 + ... + 13532.

It is an arithmetic number, because the mean of its divisors is an integer number (17082204).

Almost surely, 2^91072742 is an apocalyptic number.

91072742 is a deficient number, since it is larger than the sum of its proper divisors (45584890).

91072742 is a wasteful number, since it uses less digits than its factorization.

91072742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16174.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 91072742 is about 9543.2039693176. The cubic root of 91072742 is about 449.9139621518.

The spelling of 91072742 in words is "ninety-one million, seventy-two thousand, seven hundred forty-two".