73216777 has 2 divisors, whose sum is σ = 73216778. Its totient is φ = 73216776.

The previous prime is 73216771. The next prime is 73216799. The reversal of 73216777 is 77761237.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70963776 + 2253001 = 8424^2 + 1501^2 .

It is a cyclic number.

It is not a de Polignac number, because 73216777 - 2³ = 73216769 is a prime.

It is not a weakly prime, because it can be changed into another prime (73216771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36608388 + 36608389.

It is an arithmetic number, because the mean of its divisors is an integer number (36608389).

Almost surely, 2^73216777 is an apocalyptic number.

It is an amenable number.

73216777 is a deficient number, since it is larger than the sum of its proper divisors (1).

73216777 is an equidigital number, since it uses as much as digits as its factorization.

73216777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86436, while the sum is 40.

The square root of 73216777 is about 8556.6802558001. The cubic root of 73216777 is about 418.3472024241.

The spelling of 73216777 in words is "seventy-three million, two hundred sixteen thousand, seven hundred seventy-seven".