769480021 has 2 divisors, whose sum is σ = 769480022. Its totient is φ = 769480020.

The previous prime is 769480013. The next prime is 769480043. The reversal of 769480021 is 120084967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606636900 + 162843121 = 24630^2 + 12761^2 .

It is a cyclic number.

It is not a de Polignac number, because 769480021 - 2³ = 769480013 is a prime.

It is equal to p_39655504 and since 769480021 and 39655504 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769483021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384740010 + 384740011.

It is an arithmetic number, because the mean of its divisors is an integer number (384740011).

Almost surely, 2^769480021 is an apocalyptic number.

It is an amenable number.

769480021 is a deficient number, since it is larger than the sum of its proper divisors (1).

769480021 is an equidigital number, since it uses as much as digits as its factorization.

769480021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 769480021 is about 27739.5028974926. The cubic root of 769480021 is about 916.3592808403.

The spelling of 769480021 in words is "seven hundred sixty-nine million, four hundred eighty thousand, twenty-one".