679509487 has 2 divisors, whose sum is σ = 679509488. Its totient is φ = 679509486.

The previous prime is 679509427. The next prime is 679509497. The reversal of 679509487 is 784905976.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679509487 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 (679509427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339754743 + 339754744.

It is an arithmetic number, because the mean of its divisors is an integer number (339754744).

Almost surely, 2^679509487 is an apocalyptic number.

679509487 is a deficient number, since it is larger than the sum of its proper divisors (1).

679509487 is an equidigital number, since it uses as much as digits as its factorization.

679509487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The square root of 679509487 is about 26067.4027666739. The cubic root of 679509487 is about 879.1544421871.

The spelling of 679509487 in words is "six hundred seventy-nine million, five hundred nine thousand, four hundred eighty-seven".