499981451 has 2 divisors, whose sum is σ = 499981452. Its totient is φ = 499981450.

The previous prime is 499981379. The next prime is 499981457. The reversal of 499981451 is 154189994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499981451 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 499981451.

It is not a weakly prime, because it can be changed into another prime (499981457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249990725 + 249990726.

It is an arithmetic number, because the mean of its divisors is an integer number (249990726).

Almost surely, 2^499981451 is an apocalyptic number.

499981451 is a deficient number, since it is larger than the sum of its proper divisors (1).

499981451 is an equidigital number, since it uses as much as digits as its factorization.

499981451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The square root of 499981451 is about 22360.2650029019. The cubic root of 499981451 is about 793.6907109620.

The spelling of 499981451 in words is "four hundred ninety-nine million, nine hundred eighty-one thousand, four hundred fifty-one".