140439307 has 2 divisors, whose sum is σ = 140439308. Its totient is φ = 140439306.

The previous prime is 140439289. The next prime is 140439323. The reversal of 140439307 is 703934041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140439307 - 2⁷ = 140439179 is a prime.

It is not a weakly prime, because it can be changed into another prime (140439407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70219653 + 70219654.

It is an arithmetic number, because the mean of its divisors is an integer number (70219654).

Almost surely, 2^140439307 is an apocalyptic number.

140439307 is a deficient number, since it is larger than the sum of its proper divisors (1).

140439307 is an equidigital number, since it uses as much as digits as its factorization.

140439307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 140439307 is about 11850.7091348999. The cubic root of 140439307 is about 519.7919618990.

The spelling of 140439307 in words is "one hundred forty million, four hundred thirty-nine thousand, three hundred seven".