71620751 has 2 divisors, whose sum is σ = 71620752. Its totient is φ = 71620750.

The previous prime is 71620699. The next prime is 71620777. The reversal of 71620751 is 15702617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71620751 - 2¹⁰ = 71619727 is a prime.

It is a Sophie Germain 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 (71620651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35810375 + 35810376.

It is an arithmetic number, because the mean of its divisors is an integer number (35810376).

Almost surely, 2^71620751 is an apocalyptic number.

71620751 is a deficient number, since it is larger than the sum of its proper divisors (1).

71620751 is an equidigital number, since it uses as much as digits as its factorization.

71620751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 71620751 is about 8462.9044068807. The cubic root of 71620751 is about 415.2850434429.

The spelling of 71620751 in words is "seventy-one million, six hundred twenty thousand, seven hundred fifty-one".