91139702 has 4 divisors (see below), whose sum is σ = 136709556. Its totient is φ = 45569850.

The previous prime is 91139683. The next prime is 91139723. The reversal of 91139702 is 20793119.

It is a happy number.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 22784924 + ... + 22784927.

It is an arithmetic number, because the mean of its divisors is an integer number (34177389).

Almost surely, 2^91139702 is an apocalyptic number.

91139702 is a deficient number, since it is larger than the sum of its proper divisors (45569854).

91139702 is a wasteful number, since it uses less digits than its factorization.

91139702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45569853.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 91139702 is about 9546.7115804344. The cubic root of 91139702 is about 450.0241995217.

The spelling of 91139702 in words is "ninety-one million, one hundred thirty-nine thousand, seven hundred two".