1669698 has 12 divisors (see below), whose sum is σ = 3617718. Its totient is φ = 556560.

The previous prime is 1669697. The next prime is 1669727. The reversal of 1669698 is 8969661.

It can be written as a sum of positive squares in only one way, i.e., 1595169 + 74529 = 1263^2 + 273^2 .

It is a super-2 number, since 2×1669698² = 5575782822408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1669697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46363 + ... + 46398.

2^1669698 is an apocalyptic number.

1669698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1669698 is an abundant number, since it is smaller than the sum of its proper divisors (1948020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1669698 is a wasteful number, since it uses less digits than its factorization.

1669698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92769 (or 92766 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 1669698 is about 1292.1679457408. The cubic root of 1669698 is about 118.6349474763.

The spelling of 1669698 in words is "one million, six hundred sixty-nine thousand, six hundred ninety-eight".