71967619 has 2 divisors, whose sum is σ = 71967620. Its totient is φ = 71967618.

The previous prime is 71967593. The next prime is 71967629. The reversal of 71967619 is 91676917.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71967619 - 2⁷ = 71967491 is a prime.

It is a super-2 number, since 2×71967619² = 10358676369058322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71967629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35983809 + 35983810.

It is an arithmetic number, because the mean of its divisors is an integer number (35983810).

Almost surely, 2^71967619 is an apocalyptic number.

71967619 is a deficient number, since it is larger than the sum of its proper divisors (1).

71967619 is an equidigital number, since it uses as much as digits as its factorization.

71967619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 46.

The square root of 71967619 is about 8483.3730909350. The cubic root of 71967619 is about 415.9543893380.

The spelling of 71967619 in words is "seventy-one million, nine hundred sixty-seven thousand, six hundred nineteen".