91194139 has 2 divisors, whose sum is σ = 91194140. Its totient is φ = 91194138.

The previous prime is 91194133. The next prime is 91194143. The reversal of 91194139 is 93149119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91194139 - 2⁵ = 91194107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91194098 and 91194107.

It is not a weakly prime, because it can be changed into another prime (91194133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45597069 + 45597070.

It is an arithmetic number, because the mean of its divisors is an integer number (45597070).

Almost surely, 2^91194139 is an apocalyptic number.

91194139 is a deficient number, since it is larger than the sum of its proper divisors (1).

91194139 is an equidigital number, since it uses as much as digits as its factorization.

91194139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 37.

The square root of 91194139 is about 9549.5622412758. The cubic root of 91194139 is about 450.1137802823.

The spelling of 91194139 in words is "ninety-one million, one hundred ninety-four thousand, one hundred thirty-nine".