1670860787 has 2 divisors, whose sum is σ = 1670860788. Its totient is φ = 1670860786.

The previous prime is 1670860757. The next prime is 1670860831. The reversal of 1670860787 is 7870680761.

It is a weak prime.

It is an emirp because it is prime and its reverse (7870680761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1670860787 - 2¹⁴ = 1670844403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1670860757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835430393 + 835430394.

It is an arithmetic number, because the mean of its divisors is an integer number (835430394).

Almost surely, 2^1670860787 is an apocalyptic number.

1670860787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670860787 is an equidigital number, since it uses as much as digits as its factorization.

1670860787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 50.

The square root of 1670860787 is about 40876.1640445872. The cubic root of 1670860787 is about 1186.6248043225.

The spelling of 1670860787 in words is "one billion, six hundred seventy million, eight hundred sixty thousand, seven hundred eighty-seven".