53430991 has 2 divisors, whose sum is σ = 53430992. Its totient is φ = 53430990.

The previous prime is 53430989. The next prime is 53431009. The reversal of 53430991 is 19903435.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53430991 - 2¹ = 53430989 is a prime.

Together with 53430989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53430961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26715495 + 26715496.

It is an arithmetic number, because the mean of its divisors is an integer number (26715496).

Almost surely, 2^53430991 is an apocalyptic number.

53430991 is a deficient number, since it is larger than the sum of its proper divisors (1).

53430991 is an equidigital number, since it uses as much as digits as its factorization.

53430991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 53430991 is about 7309.6505388425. The cubic root of 53430991 is about 376.6440199226.

The spelling of 53430991 in words is "fifty-three million, four hundred thirty thousand, nine hundred ninety-one".