91060421 has 4 divisors (see below), whose sum is σ = 91079712. Its totient is φ = 91041132.

The previous prime is 91060393. The next prime is 91060451. The reversal of 91060421 is 12406019.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12406019 = 617 ⋅20107.

It is a cyclic number.

It is not a de Polignac number, because 91060421 - 2¹⁸ = 90798277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91060451) 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, 2720 + ... + 13766.

It is an arithmetic number, because the mean of its divisors is an integer number (22769928).

Almost surely, 2^91060421 is an apocalyptic number.

It is an amenable number.

91060421 is a deficient number, since it is larger than the sum of its proper divisors (19291).

91060421 is a wasteful number, since it uses less digits than its factorization.

91060421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19290.

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

The square root of 91060421 is about 9542.5584095671. The cubic root of 91060421 is about 449.8936719977.

The spelling of 91060421 in words is "ninety-one million, sixty thousand, four hundred twenty-one".