1670167979 has 4 divisors (see below), whose sum is σ = 1670249784. Its totient is φ = 1670086176.

The previous prime is 1670167973. The next prime is 1670167981. The reversal of 1670167979 is 9797610761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9797610761 = 6163 ⋅1589747.

It is a cyclic number.

It is not a de Polignac number, because 1670167979 - 2¹⁶ = 1670102443 is a prime.

It is a super-2 number, since 2×1670167979² = 5578922156153888882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1670167979.

It is not an unprimeable number, because it can be changed into a prime (1670167973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17939 + ... + 60515.

It is an arithmetic number, because the mean of its divisors is an integer number (417562446).

Almost surely, 2^1670167979 is an apocalyptic number.

1670167979 is a deficient number, since it is larger than the sum of its proper divisors (81805).

1670167979 is an equidigital number, since it uses as much as digits as its factorization.

1670167979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81804.

The product of its (nonzero) digits is 1000188, while the sum is 53.

The square root of 1670167979 is about 40867.6886916792. The cubic root of 1670167979 is about 1186.4607737390.

The spelling of 1670167979 in words is "one billion, six hundred seventy million, one hundred sixty-seven thousand, nine hundred seventy-nine".