140515679 has 2 divisors, whose sum is σ = 140515680. Its totient is φ = 140515678.

The previous prime is 140515663. The next prime is 140515699. The reversal of 140515679 is 976515041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140515679 - 2⁴ = 140515663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140515619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70257839 + 70257840.

It is an arithmetic number, because the mean of its divisors is an integer number (70257840).

Almost surely, 2^140515679 is an apocalyptic number.

140515679 is a deficient number, since it is larger than the sum of its proper divisors (1).

140515679 is an equidigital number, since it uses as much as digits as its factorization.

140515679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 140515679 is about 11853.9309513764. The cubic root of 140515679 is about 519.8861671439.

The spelling of 140515679 in words is "one hundred forty million, five hundred fifteen thousand, six hundred seventy-nine".