91121234 has 4 divisors (see below), whose sum is σ = 136681854. Its totient is φ = 45560616.

The previous prime is 91121227. The next prime is 91121237. The reversal of 91121234 is 43212119.

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

It can be written as a sum of positive squares in only one way, i.e., 56957209 + 34164025 = 7547^2 + 5845^2 .

It is not an unprimeable number, because it can be changed into a prime (91121237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22780307 + ... + 22780310.

Almost surely, 2^91121234 is an apocalyptic number.

91121234 is a deficient number, since it is larger than the sum of its proper divisors (45560620).

91121234 is a wasteful number, since it uses less digits than its factorization.

91121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45560619.

The product of its digits is 432, while the sum is 23.

The square root of 91121234 is about 9545.7442873775. The cubic root of 91121234 is about 449.9938007376.

The spelling of 91121234 in words is "ninety-one million, one hundred twenty-one thousand, two hundred thirty-four".