53121091 has 2 divisors, whose sum is σ = 53121092. Its totient is φ = 53121090.

The previous prime is 53121077. The next prime is 53121109. The reversal of 53121091 is 19012135.

Together with next prime (53121109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53121091 - 2⁵ = 53121059 is a prime.

It is not a weakly prime, because it can be changed into another prime (53121001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26560545 + 26560546.

It is an arithmetic number, because the mean of its divisors is an integer number (26560546).

Almost surely, 2^53121091 is an apocalyptic number.

53121091 is a deficient number, since it is larger than the sum of its proper divisors (1).

53121091 is an equidigital number, since it uses as much as digits as its factorization.

53121091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 53121091 is about 7288.4217084359. The cubic root of 53121091 is about 375.9144285236.

The spelling of 53121091 in words is "fifty-three million, one hundred twenty-one thousand, ninety-one".