772621345 has 4 divisors (see below), whose sum is σ = 927145620. Its totient is φ = 618097072.

The previous prime is 772621319. The next prime is 772621349. The reversal of 772621345 is 543126277.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107806689 + 664814656 = 10383^2 + 25784^2 .

It is a cyclic number.

It is not a de Polignac number, because 772621345 - 2¹¹ = 772619297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (772621349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77262130 + ... + 77262139.

It is an arithmetic number, because the mean of its divisors is an integer number (231786405).

Almost surely, 2^772621345 is an apocalyptic number.

It is an amenable number.

772621345 is a deficient number, since it is larger than the sum of its proper divisors (154524275).

772621345 is a wasteful number, since it uses less digits than its factorization.

772621345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154524274.

The product of its digits is 70560, while the sum is 37.

The square root of 772621345 is about 27796.0670779159. The cubic root of 772621345 is about 917.6045690051.

The spelling of 772621345 in words is "seven hundred seventy-two million, six hundred twenty-one thousand, three hundred forty-five".