140215679 has 2 divisors, whose sum is σ = 140215680. Its totient is φ = 140215678.

The previous prime is 140215639. The next prime is 140215709. The reversal of 140215679 is 976512041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140215679 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 (140215639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70107839 + 70107840.

It is an arithmetic number, because the mean of its divisors is an integer number (70107840).

Almost surely, 2^140215679 is an apocalyptic number.

140215679 is a deficient number, since it is larger than the sum of its proper divisors (1).

140215679 is an equidigital number, since it uses as much as digits as its factorization.

140215679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 140215679 is about 11841.2701599111. The cubic root of 140215679 is about 519.5159190728.

The spelling of 140215679 in words is "one hundred forty million, two hundred fifteen thousand, six hundred seventy-nine".