770721223 has 4 divisors (see below), whose sum is σ = 776266120. Its totient is φ = 765176328.

The previous prime is 770721209. The next prime is 770721251. The reversal of 770721223 is 322127077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322127077 = 101 ⋅3189377.

It is a cyclic number.

It is not a de Polignac number, because 770721223 - 2¹⁷ = 770590151 is a prime.

It is a super-2 number, since 2×770721223² = 1188022407165231458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770721323) 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, 2772240 + ... + 2772517.

It is an arithmetic number, because the mean of its divisors is an integer number (194066530).

Almost surely, 2^770721223 is an apocalyptic number.

770721223 is a deficient number, since it is larger than the sum of its proper divisors (5544897).

770721223 is a wasteful number, since it uses less digits than its factorization.

770721223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5544896.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 770721223 is about 27761.8663457629. The cubic root of 770721223 is about 916.8517241953.

The spelling of 770721223 in words is "seven hundred seventy million, seven hundred twenty-one thousand, two hundred twenty-three".