1669307979 has 16 divisors (see below), whose sum is σ = 2374669440. Its totient is φ = 1039409280.

The previous prime is 1669307971. The next prime is 1669308001. The reversal of 1669307979 is 9797039661.

It is not a de Polignac number, because 1669307979 - 2³ = 1669307971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1669307971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118249 + ... + 131610.

It is an arithmetic number, because the mean of its divisors is an integer number (148416840).

Almost surely, 2^1669307979 is an apocalyptic number.

1669307979 is a deficient number, since it is larger than the sum of its proper divisors (705361461).

1669307979 is a wasteful number, since it uses less digits than its factorization.

1669307979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250010.

The product of its (nonzero) digits is 3857868, while the sum is 57.

The square root of 1669307979 is about 40857.1655771665. The cubic root of 1669307979 is about 1186.2570953342.

The spelling of 1669307979 in words is "one billion, six hundred sixty-nine million, three hundred seven thousand, nine hundred seventy-nine".