91406739 has 16 divisors (see below), whose sum is σ = 135838080. Its totient is φ = 54334080.

The previous prime is 91406683. The next prime is 91406743. The reversal of 91406739 is 93760419.

It is a de Polignac number, because none of the positive numbers 2^k-91406739 is a prime.

It is a super-2 number, since 2×91406739² = 16710383869228242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91406697 and 91406706.

It is not an unprimeable number, because it can be changed into a prime (91406759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46197 + ... + 48134.

It is an arithmetic number, because the mean of its divisors is an integer number (8489880).

Almost surely, 2^91406739 is an apocalyptic number.

91406739 is a deficient number, since it is larger than the sum of its proper divisors (44431341).

91406739 is a wasteful number, since it uses less digits than its factorization.

91406739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94370.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 91406739 is about 9560.6871614963. The cubic root of 91406739 is about 450.4632907635.

The spelling of 91406739 in words is "ninety-one million, four hundred six thousand, seven hundred thirty-nine".