72476777 has 2 divisors, whose sum is σ = 72476778. Its totient is φ = 72476776.

The previous prime is 72476743. The next prime is 72476779. The reversal of 72476777 is 77767427.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70744921 + 1731856 = 8411^2 + 1316^2 .

It is a cyclic number.

It is not a de Polignac number, because 72476777 - 2¹² = 72472681 is a prime.

Together with 72476779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72476779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36238388 + 36238389.

It is an arithmetic number, because the mean of its divisors is an integer number (36238389).

Almost surely, 2^72476777 is an apocalyptic number.

It is an amenable number.

72476777 is a deficient number, since it is larger than the sum of its proper divisors (1).

72476777 is an equidigital number, since it uses as much as digits as its factorization.

72476777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806736, while the sum is 47.

The square root of 72476777 is about 8513.3293722257. The cubic root of 72476777 is about 416.9330193165.

The spelling of 72476777 in words is "seventy-two million, four hundred seventy-six thousand, seven hundred seventy-seven".