73491961 has 2 divisors, whose sum is σ = 73491962. Its totient is φ = 73491960.

The previous prime is 73491959. The next prime is 73491989. The reversal of 73491961 is 16919437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48930025 + 24561936 = 6995^2 + 4956^2 .

It is a cyclic number.

It is not a de Polignac number, because 73491961 - 2¹ = 73491959 is a prime.

Together with 73491959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (73491991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36745980 + 36745981.

It is an arithmetic number, because the mean of its divisors is an integer number (36745981).

Almost surely, 2^73491961 is an apocalyptic number.

It is an amenable number.

73491961 is a deficient number, since it is larger than the sum of its proper divisors (1).

73491961 is an equidigital number, since it uses as much as digits as its factorization.

73491961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 73491961 is about 8572.7452429196. The cubic root of 73491961 is about 418.8706640908.

The spelling of 73491961 in words is "seventy-three million, four hundred ninety-one thousand, nine hundred sixty-one".