530987491 has 2 divisors, whose sum is σ = 530987492. Its totient is φ = 530987490.

The previous prime is 530987489. The next prime is 530987533. The reversal of 530987491 is 194789035.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 530987491 - 2¹ = 530987489 is a prime.

Together with 530987489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (530987461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265493745 + 265493746.

It is an arithmetic number, because the mean of its divisors is an integer number (265493746).

Almost surely, 2^530987491 is an apocalyptic number.

530987491 is a deficient number, since it is larger than the sum of its proper divisors (1).

530987491 is an equidigital number, since it uses as much as digits as its factorization.

530987491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 530987491 is about 23043.1658198261. The cubic root of 530987491 is about 809.7695279871.

The spelling of 530987491 in words is "five hundred thirty million, nine hundred eighty-seven thousand, four hundred ninety-one".