140001669 has 16 divisors (see below), whose sum is σ = 208324800. Its totient is φ = 92922768.

The previous prime is 140001643. The next prime is 140001677. The reversal of 140001669 is 966100041.

It is not a de Polignac number, because 140001669 - 2⁷ = 140001541 is a prime.

It is a super-2 number, since 2×140001669² = 39200934645571122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140009669) 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, 5139 + ... + 17504.

It is an arithmetic number, because the mean of its divisors is an integer number (13020300).

Almost surely, 2^140001669 is an apocalyptic number.

It is an amenable number.

140001669 is a deficient number, since it is larger than the sum of its proper divisors (68323131).

140001669 is a wasteful number, since it uses less digits than its factorization.

140001669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22881 (or 22875 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 140001669 is about 11832.2300941116. The cubic root of 140001669 is about 519.2514735752.

The spelling of 140001669 in words is "one hundred forty million, one thousand, six hundred sixty-nine".