73961220919 has 2 divisors, whose sum is σ = 73961220920. Its totient is φ = 73961220918.

The previous prime is 73961220863. The next prime is 73961220923. The reversal of 73961220919 is 91902216937.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73961220919 - 2⁷ = 73961220791 is a prime.

It is a super-2 number, since 2×73961220919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73961220959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36980610459 + 36980610460.

It is an arithmetic number, because the mean of its divisors is an integer number (36980610460).

Almost surely, 2^73961220919 is an apocalyptic number.

73961220919 is a deficient number, since it is larger than the sum of its proper divisors (1).

73961220919 is an equidigital number, since it uses as much as digits as its factorization.

73961220919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 49.

The spelling of 73961220919 in words is "seventy-three billion, nine hundred sixty-one million, two hundred twenty thousand, nine hundred nineteen".