91140142 has 8 divisors (see below), whose sum is σ = 138357576. Its totient is φ = 45020952.

The previous prime is 91140121. The next prime is 91140143. The reversal of 91140142 is 24104119.

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 (91140143) 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, 274353 + ... + 274684.

It is an arithmetic number, because the mean of its divisors is an integer number (17294697).

Almost surely, 2^91140142 is an apocalyptic number.

91140142 is a deficient number, since it is larger than the sum of its proper divisors (47217434).

91140142 is a wasteful number, since it uses less digits than its factorization.

91140142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549122.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 91140142 is about 9546.7346249909. The cubic root of 91140142 is about 450.0249237224.

The spelling of 91140142 in words is "ninety-one million, one hundred forty thousand, one hundred forty-two".