71763997 has 2 divisors, whose sum is σ = 71763998. Its totient is φ = 71763996.

The previous prime is 71763973. The next prime is 71764003. The reversal of 71763997 is 79936717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67996516 + 3767481 = 8246^2 + 1941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71763997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71763997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71763917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35881998 + 35881999.

It is an arithmetic number, because the mean of its divisors is an integer number (35881999).

Almost surely, 2^71763997 is an apocalyptic number.

It is an amenable number.

71763997 is a deficient number, since it is larger than the sum of its proper divisors (1).

71763997 is an equidigital number, since it uses as much as digits as its factorization.

71763997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500094, while the sum is 49.

The square root of 71763997 is about 8471.3633495442. The cubic root of 71763997 is about 415.5617244544.

The spelling of 71763997 in words is "seventy-one million, seven hundred sixty-three thousand, nine hundred ninety-seven".