140431399 has 4 divisors (see below), whose sum is σ = 146537136. Its totient is φ = 134325664.

The previous prime is 140431367. The next prime is 140431411. The reversal of 140431399 is 993134041.

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 140431399 - 2⁵ = 140431367 is a prime.

It is a super-3 number, since 3×140431399³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140431199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3052834 + ... + 3052879.

It is an arithmetic number, because the mean of its divisors is an integer number (36634284).

Almost surely, 2^140431399 is an apocalyptic number.

140431399 is a deficient number, since it is larger than the sum of its proper divisors (6105737).

140431399 is an equidigital number, since it uses as much as digits as its factorization.

140431399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105736.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 140431399 is about 11850.3754792833. The cubic root of 140431399 is about 519.7822053902.

The spelling of 140431399 in words is "one hundred forty million, four hundred thirty-one thousand, three hundred ninety-nine".