245491487 has 2 divisors, whose sum is σ = 245491488. Its totient is φ = 245491486.

The previous prime is 245491469. The next prime is 245491501. The reversal of 245491487 is 784194542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245491487 - 2¹⁶ = 245425951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245491427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122745743 + 122745744.

It is an arithmetic number, because the mean of its divisors is an integer number (122745744).

Almost surely, 2^245491487 is an apocalyptic number.

245491487 is a deficient number, since it is larger than the sum of its proper divisors (1).

245491487 is an equidigital number, since it uses as much as digits as its factorization.

245491487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 245491487 is about 15668.1679528910. The cubic root of 245491487 is about 626.1506160059.

The spelling of 245491487 in words is "two hundred forty-five million, four hundred ninety-one thousand, four hundred eighty-seven".