771222993 has 4 divisors (see below), whose sum is σ = 1028297328. Its totient is φ = 514148660.

The previous prime is 771222983. The next prime is 771223001. The reversal of 771222993 is 399222177.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399222177 = 3 ⋅133074059.

It is a cyclic number.

It is not a de Polignac number, because 771222993 - 2⁵ = 771222961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (771222943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128537163 + ... + 128537168.

It is an arithmetic number, because the mean of its divisors is an integer number (257074332).

Almost surely, 2^771222993 is an apocalyptic number.

It is an amenable number.

771222993 is a deficient number, since it is larger than the sum of its proper divisors (257074335).

771222993 is a wasteful number, since it uses less digits than its factorization.

771222993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257074334.

The product of its digits is 95256, while the sum is 42.

The square root of 771222993 is about 27770.9019118933. The cubic root of 771222993 is about 917.0506499441.

The spelling of 771222993 in words is "seven hundred seventy-one million, two hundred twenty-two thousand, nine hundred ninety-three".