772728623 has 2 divisors, whose sum is σ = 772728624. Its totient is φ = 772728622.

The previous prime is 772728617. The next prime is 772728637. The reversal of 772728623 is 326827277.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 772728623 - 2⁸ = 772728367 is a prime.

It is a super-2 number, since 2×772728623² = 1194219049606952258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (772728643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386364311 + 386364312.

It is an arithmetic number, because the mean of its divisors is an integer number (386364312).

Almost surely, 2^772728623 is an apocalyptic number.

772728623 is a deficient number, since it is larger than the sum of its proper divisors (1).

772728623 is an equidigital number, since it uses as much as digits as its factorization.

772728623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 44.

The square root of 772728623 is about 27797.9967443699. The cubic root of 772728623 is about 917.6470366502.

The spelling of 772728623 in words is "seven hundred seventy-two million, seven hundred twenty-eight thousand, six hundred twenty-three".