140490491 has 4 divisors (see below), whose sum is σ = 142587432. Its totient is φ = 138393552.

The previous prime is 140490479. The next prime is 140490523. The reversal of 140490491 is 194094041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140490491 - 2¹⁰ = 140489467 is a prime.

It is a super-2 number, since 2×140490491² = 39475156122842162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140490401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048370 + ... + 1048503.

It is an arithmetic number, because the mean of its divisors is an integer number (35646858).

Almost surely, 2^140490491 is an apocalyptic number.

140490491 is a deficient number, since it is larger than the sum of its proper divisors (2096941).

140490491 is an equidigital number, since it uses as much as digits as its factorization.

140490491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096940.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 140490491 is about 11852.8684713870. The cubic root of 140490491 is about 519.8551013929.

The spelling of 140490491 in words is "one hundred forty million, four hundred ninety thousand, four hundred ninety-one".