1670400379 has 2 divisors, whose sum is σ = 1670400380. Its totient is φ = 1670400378.

The previous prime is 1670400367. The next prime is 1670400419. The reversal of 1670400379 is 9730040761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1670400379 - 2¹³ = 1670392187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1670400349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835200189 + 835200190.

It is an arithmetic number, because the mean of its divisors is an integer number (835200190).

Almost surely, 2^1670400379 is an apocalyptic number.

1670400379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670400379 is an equidigital number, since it uses as much as digits as its factorization.

1670400379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 1670400379 is about 40870.5319148161. The cubic root of 1670400379 is about 1186.5158022749.

The spelling of 1670400379 in words is "one billion, six hundred seventy million, four hundred thousand, three hundred seventy-nine".