670284787 has 2 divisors, whose sum is σ = 670284788. Its totient is φ = 670284786.

The previous prime is 670284749. The next prime is 670284803. The reversal of 670284787 is 787482076.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670284787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 670284787.

It is not a weakly prime, because it can be changed into another prime (670284887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335142393 + 335142394.

It is an arithmetic number, because the mean of its divisors is an integer number (335142394).

Almost surely, 2^670284787 is an apocalyptic number.

670284787 is a deficient number, since it is larger than the sum of its proper divisors (1).

670284787 is an equidigital number, since it uses as much as digits as its factorization.

670284787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The square root of 670284787 is about 25889.8587674788. The cubic root of 670284787 is about 875.1579739808.

The spelling of 670284787 in words is "six hundred seventy million, two hundred eighty-four thousand, seven hundred eighty-seven".