91216942 has 32 divisors (see below), whose sum is σ = 150626304. Its totient is φ = 41289600.

The previous prime is 91216921. The next prime is 91216963. The reversal of 91216942 is 24961219.

It is an interprime number because it is at equal distance from previous prime (91216921) and next prime (91216963).

It is a junction number, because it is equal to n+sod(n) for n = 91216898 and 91216907.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 66342 + ... + 67702.

It is an arithmetic number, because the mean of its divisors is an integer number (4707072).

Almost surely, 2^91216942 is an apocalyptic number.

91216942 is a deficient number, since it is larger than the sum of its proper divisors (59409362).

91216942 is a wasteful number, since it uses less digits than its factorization.

91216942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464.

The product of its digits is 7776, while the sum is 34.

The square root of 91216942 is about 9550.7560957235. The cubic root of 91216942 is about 450.1512939839.

The spelling of 91216942 in words is "ninety-one million, two hundred sixteen thousand, nine hundred forty-two".