91460421 has 20 divisors (see below), whose sum is σ = 147137452. Its totient is φ = 56282688.

The previous prime is 91460419. The next prime is 91460477. The reversal of 91460421 is 12406419.

It can be written as a sum of positive squares in 2 ways, for example, as 22752900 + 68707521 = 4770^2 + 8289^2 .

It is not a de Polignac number, because 91460421 - 2¹ = 91460419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91460321) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42376 + ... + 44481.

Almost surely, 2^91460421 is an apocalyptic number.

It is an amenable number.

91460421 is a deficient number, since it is larger than the sum of its proper divisors (55677031).

91460421 is a wasteful number, since it uses less digits than its factorization.

91460421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86882 (or 86873 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 91460421 is about 9563.4941836130. The cubic root of 91460421 is about 450.5514572681.

The spelling of 91460421 in words is "ninety-one million, four hundred sixty thousand, four hundred twenty-one".