747780487 has 2 divisors, whose sum is σ = 747780488. Its totient is φ = 747780486.

The previous prime is 747780443. The next prime is 747780559. The reversal of 747780487 is 784087747.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-747780487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (747780437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373890243 + 373890244.

It is an arithmetic number, because the mean of its divisors is an integer number (373890244).

Almost surely, 2^747780487 is an apocalyptic number.

747780487 is a deficient number, since it is larger than the sum of its proper divisors (1).

747780487 is an equidigital number, since it uses as much as digits as its factorization.

747780487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2458624, while the sum is 52.

The square root of 747780487 is about 27345.5752727932. The cubic root of 747780487 is about 907.6631613478.

The spelling of 747780487 in words is "seven hundred forty-seven million, seven hundred eighty thousand, four hundred eighty-seven".