71773967 has 2 divisors, whose sum is σ = 71773968. Its totient is φ = 71773966.

The previous prime is 71773937. The next prime is 71773973. The reversal of 71773967 is 76937717.

It is a strong prime.

It is an emirp because it is prime and its reverse (76937717) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71773967 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 (71773937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35886983 + 35886984.

It is an arithmetic number, because the mean of its divisors is an integer number (35886984).

Almost surely, 2^71773967 is an apocalyptic number.

71773967 is a deficient number, since it is larger than the sum of its proper divisors (1).

71773967 is an equidigital number, since it uses as much as digits as its factorization.

71773967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388962, while the sum is 47.

The square root of 71773967 is about 8471.9517822046. The cubic root of 71773967 is about 415.5809678945.

The spelling of 71773967 in words is "seventy-one million, seven hundred seventy-three thousand, nine hundred sixty-seven".