71905679 has 2 divisors, whose sum is σ = 71905680. Its totient is φ = 71905678.

The previous prime is 71905663. The next prime is 71905711. The reversal of 71905679 is 97650917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71905679 - 2⁴ = 71905663 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71905609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35952839 + 35952840.

It is an arithmetic number, because the mean of its divisors is an integer number (35952840).

Almost surely, 2^71905679 is an apocalyptic number.

71905679 is a deficient number, since it is larger than the sum of its proper divisors (1).

71905679 is an equidigital number, since it uses as much as digits as its factorization.

71905679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 71905679 is about 8479.7216345821. The cubic root of 71905679 is about 415.8350226459.

The spelling of 71905679 in words is "seventy-one million, nine hundred five thousand, six hundred seventy-nine".