140636169 has 20 divisors (see below), whose sum is σ = 211614480. Its totient is φ = 93075480.

The previous prime is 140636147. The next prime is 140636201. The reversal of 140636169 is 961636041.

140636169 is a `hidden beast` number, since 1 + 4 + 0 + 636 + 16 + 9 = 666.

It is not a de Polignac number, because 140636169 - 2¹² = 140632073 is a prime.

It is a super-2 number, since 2×140636169² = 39557064061993122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140636369) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5014 + ... + 17504.

It is an arithmetic number, because the mean of its divisors is an integer number (10580724).

Almost surely, 2^140636169 is an apocalyptic number.

It is an amenable number.

140636169 is a deficient number, since it is larger than the sum of its proper divisors (70978311).

140636169 is a wasteful number, since it uses less digits than its factorization.

140636169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642 (or 12633 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 140636169 is about 11859.0121426702. The cubic root of 140636169 is about 520.0347227800.

The spelling of 140636169 in words is "one hundred forty million, six hundred thirty-six thousand, one hundred sixty-nine".