71380691 has 2 divisors, whose sum is σ = 71380692. Its totient is φ = 71380690.

The previous prime is 71380679. The next prime is 71380697. The reversal of 71380691 is 19608317.

It is a strong prime.

It is an emirp because it is prime and its reverse (19608317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71380691 - 2⁶ = 71380627 is a prime.

It is not a weakly prime, because it can be changed into another prime (71380697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35690345 + 35690346.

It is an arithmetic number, because the mean of its divisors is an integer number (35690346).

Almost surely, 2^71380691 is an apocalyptic number.

71380691 is a deficient number, since it is larger than the sum of its proper divisors (1).

71380691 is an equidigital number, since it uses as much as digits as its factorization.

71380691 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 35.

The square root of 71380691 is about 8448.7094280724. The cubic root of 71380691 is about 414.8205369102.

The spelling of 71380691 in words is "seventy-one million, three hundred eighty thousand, six hundred ninety-one".