73640071 has 2 divisors, whose sum is σ = 73640072. Its totient is φ = 73640070.

The previous prime is 73640069. The next prime is 73640093. The reversal of 73640071 is 17004637.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73640071 - 2¹ = 73640069 is a prime.

Together with 73640069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73640771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36820035 + 36820036.

It is an arithmetic number, because the mean of its divisors is an integer number (36820036).

Almost surely, 2^73640071 is an apocalyptic number.

73640071 is a deficient number, since it is larger than the sum of its proper divisors (1).

73640071 is an equidigital number, since it uses as much as digits as its factorization.

73640071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 73640071 is about 8581.3793180351. The cubic root of 73640071 is about 419.1518617604.

The spelling of 73640071 in words is "seventy-three million, six hundred forty thousand, seventy-one".