71642533 has 2 divisors, whose sum is σ = 71642534. Its totient is φ = 71642532.

The previous prime is 71642513. The next prime is 71642537. The reversal of 71642533 is 33524617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71622369 + 20164 = 8463^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 71642533 - 2²⁵ = 38088101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71642495 and 71642504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71642537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35821266 + 35821267.

It is an arithmetic number, because the mean of its divisors is an integer number (35821267).

Almost surely, 2^71642533 is an apocalyptic number.

It is an amenable number.

71642533 is a deficient number, since it is larger than the sum of its proper divisors (1).

71642533 is an equidigital number, since it uses as much as digits as its factorization.

71642533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 71642533 is about 8464.1912194846. The cubic root of 71642533 is about 415.3271393524.

The spelling of 71642533 in words is "seventy-one million, six hundred forty-two thousand, five hundred thirty-three".