140394669 has 8 divisors (see below), whose sum is σ = 187427520. Its totient is φ = 93479136.

The previous prime is 140394649. The next prime is 140394679. The reversal of 140394669 is 966493041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140394669 - 2⁵ = 140394637 is a prime.

It is a super-2 number, since 2×140394669² = 39421326167239122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 140394669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140394649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26497 + ... + 31350.

It is an arithmetic number, because the mean of its divisors is an integer number (23428440).

Almost surely, 2^140394669 is an apocalyptic number.

It is an amenable number.

140394669 is a deficient number, since it is larger than the sum of its proper divisors (47032851).

140394669 is an equidigital number, since it uses as much as digits as its factorization.

140394669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58659.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 140394669 is about 11848.8256380116. The cubic root of 140394669 is about 519.7368848867.

The spelling of 140394669 in words is "one hundred forty million, three hundred ninety-four thousand, six hundred sixty-nine".