1670405357 has 2 divisors, whose sum is σ = 1670405358. Its totient is φ = 1670405356.

The previous prime is 1670405327. The next prime is 1670405369. The reversal of 1670405357 is 7535040761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1364120356 + 306285001 = 36934^2 + 17501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670405357 - 2¹² = 1670401261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1670405357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670405327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835202678 + 835202679.

It is an arithmetic number, because the mean of its divisors is an integer number (835202679).

Almost surely, 2^1670405357 is an apocalyptic number.

It is an amenable number.

1670405357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670405357 is an equidigital number, since it uses as much as digits as its factorization.

1670405357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 1670405357 is about 40870.5928143941. The cubic root of 1670405357 is about 1186.5169809284.

The spelling of 1670405357 in words is "one billion, six hundred seventy million, four hundred five thousand, three hundred fifty-seven".