91470641 has 2 divisors, whose sum is σ = 91470642. Its totient is φ = 91470640.

The previous prime is 91470637. The next prime is 91470647. The reversal of 91470641 is 14607419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86564416 + 4906225 = 9304^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 91470641 - 2² = 91470637 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91470598 and 91470607.

It is not a weakly prime, because it can be changed into another prime (91470647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45735320 + 45735321.

It is an arithmetic number, because the mean of its divisors is an integer number (45735321).

Almost surely, 2^91470641 is an apocalyptic number.

It is an amenable number.

91470641 is a deficient number, since it is larger than the sum of its proper divisors (1).

91470641 is an equidigital number, since it uses as much as digits as its factorization.

91470641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 91470641 is about 9564.0284922202. The cubic root of 91470641 is about 450.5682385321.

The spelling of 91470641 in words is "ninety-one million, four hundred seventy thousand, six hundred forty-one".