497897381 has 2 divisors, whose sum is σ = 497897382. Its totient is φ = 497897380.

The previous prime is 497897359. The next prime is 497897431. The reversal of 497897381 is 183798794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 457574881 + 40322500 = 21391^2 + 6350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-497897381 is a prime.

It is a super-2 number, since 2×497897381² = 495803604013318322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (497897321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248948690 + 248948691.

It is an arithmetic number, because the mean of its divisors is an integer number (248948691).

Almost surely, 2^497897381 is an apocalyptic number.

It is an amenable number.

497897381 is a deficient number, since it is larger than the sum of its proper divisors (1).

497897381 is an equidigital number, since it uses as much as digits as its factorization.

497897381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 56.

The square root of 497897381 is about 22313.6142522900. The cubic root of 497897381 is about 792.5863962572.

The spelling of 497897381 in words is "four hundred ninety-seven million, eight hundred ninety-seven thousand, three hundred eighty-one".