548991497 has 2 divisors, whose sum is σ = 548991498. Its totient is φ = 548991496.

The previous prime is 548991479. The next prime is 548991503. The reversal of 548991497 is 794199845.

Together with previous prime (548991479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312723856 + 236267641 = 17684^2 + 15371^2 .

It is a cyclic number.

It is not a de Polignac number, because 548991497 - 2²⁰ = 547942921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (548991097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274495748 + 274495749.

It is an arithmetic number, because the mean of its divisors is an integer number (274495749).

Almost surely, 2^548991497 is an apocalyptic number.

It is an amenable number.

548991497 is a deficient number, since it is larger than the sum of its proper divisors (1).

548991497 is an equidigital number, since it uses as much as digits as its factorization.

548991497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 56.

The square root of 548991497 is about 23430.5675774190. The cubic root of 548991497 is about 818.8201836230.

The spelling of 548991497 in words is "five hundred forty-eight million, nine hundred ninety-one thousand, four hundred ninety-seven".