1670399959 has 2 divisors, whose sum is σ = 1670399960. Its totient is φ = 1670399958.

The previous prime is 1670399921. The next prime is 1670399963. The reversal of 1670399959 is 9599930761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1670399959 - 2¹⁵ = 1670367191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670399989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835199979 + 835199980.

It is an arithmetic number, because the mean of its divisors is an integer number (835199980).

Almost surely, 2^1670399959 is an apocalyptic number.

1670399959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670399959 is an equidigital number, since it uses as much as digits as its factorization.

1670399959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4133430, while the sum is 58.

The square root of 1670399959 is about 40870.5267766394. The cubic root of 1670399959 is about 1186.5157028303.

The spelling of 1670399959 in words is "one billion, six hundred seventy million, three hundred ninety-nine thousand, nine hundred fifty-nine".