7478449687 has 2 divisors, whose sum is σ = 7478449688. Its totient is φ = 7478449686.

The previous prime is 7478449681. The next prime is 7478449729. The reversal of 7478449687 is 7869448747.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7478449687 - 2¹⁵ = 7478416919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7478449681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3739224843 + 3739224844.

It is an arithmetic number, because the mean of its divisors is an integer number (3739224844).

Almost surely, 2^7478449687 is an apocalyptic number.

7478449687 is a deficient number, since it is larger than the sum of its proper divisors (1).

7478449687 is an equidigital number, since it uses as much as digits as its factorization.

7478449687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75866112, while the sum is 64.

The square root of 7478449687 is about 86478.0300827904. The cubic root of 7478449687 is about 1955.5572081864.

The spelling of 7478449687 in words is "seven billion, four hundred seventy-eight million, four hundred forty-nine thousand, six hundred eighty-seven".