140451813 has 24 divisors (see below), whose sum is σ = 211629600. Its totient is φ = 93082608.

The previous prime is 140451799. The next prime is 140451863. The reversal of 140451813 is 318154041.

It is a happy number.

140451813 is a `hidden beast` number, since 140 + 4 + 518 + 1 + 3 = 666.

It is not a de Polignac number, because 140451813 - 2⁴ = 140451797 is a prime.

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 (140451863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41883 + ... + 45111.

It is an arithmetic number, because the mean of its divisors is an integer number (8817900).

Almost surely, 2^140451813 is an apocalyptic number.

It is an amenable number.

140451813 is a deficient number, since it is larger than the sum of its proper divisors (71177787).

140451813 is an equidigital number, since it uses as much as digits as its factorization.

140451813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423 (or 3411 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 140451813 is about 11851.2367709029. The cubic root of 140451813 is about 519.8073904507.

The spelling of 140451813 in words is "one hundred forty million, four hundred fifty-one thousand, eight hundred thirteen".