91079129 has 4 divisors (see below), whose sum is σ = 92102580. Its totient is φ = 90055680.

The previous prime is 91079113. The next prime is 91079143. The reversal of 91079129 is 92197019.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37027225 + 54051904 = 6085^2 + 7352^2 .

It is a cyclic number.

It is not a de Polignac number, because 91079129 - 2⁴ = 91079113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91079092 and 91079101.

It is not an unprimeable number, because it can be changed into a prime (91079159) 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, 511592 + ... + 511769.

It is an arithmetic number, because the mean of its divisors is an integer number (23025645).

Almost surely, 2^91079129 is an apocalyptic number.

It is an amenable number.

91079129 is a deficient number, since it is larger than the sum of its proper divisors (1023451).

91079129 is a wasteful number, since it uses less digits than its factorization.

91079129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023450.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 91079129 is about 9543.5385994923. The cubic root of 91079129 is about 449.9244795077.

The spelling of 91079129 in words is "ninety-one million, seventy-nine thousand, one hundred twenty-nine".