71380999 has 2 divisors, whose sum is σ = 71381000. Its totient is φ = 71380998.

The previous prime is 71380993. The next prime is 71381017. The reversal of 71380999 is 99908317.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71380999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71380993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35690499 + 35690500.

It is an arithmetic number, because the mean of its divisors is an integer number (35690500).

Almost surely, 2^71380999 is an apocalyptic number.

71380999 is a deficient number, since it is larger than the sum of its proper divisors (1).

71380999 is an equidigital number, since it uses as much as digits as its factorization.

71380999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 71380999 is about 8448.7276556888. The cubic root of 71380999 is about 414.8211335446.

The spelling of 71380999 in words is "seventy-one million, three hundred eighty thousand, nine hundred ninety-nine".