769569421 has 2 divisors, whose sum is σ = 769569422. Its totient is φ = 769569420.

The previous prime is 769569371. The next prime is 769569461. The reversal of 769569421 is 124965967.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474760521 + 294808900 = 21789^2 + 17170^2 .

It is a cyclic number.

It is not a de Polignac number, because 769569421 - 2¹³ = 769561229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769569461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384784710 + 384784711.

It is an arithmetic number, because the mean of its divisors is an integer number (384784711).

Almost surely, 2^769569421 is an apocalyptic number.

It is an amenable number.

769569421 is a deficient number, since it is larger than the sum of its proper divisors (1).

769569421 is an equidigital number, since it uses as much as digits as its factorization.

769569421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 769569421 is about 27741.1142710598. The cubic root of 769569421 is about 916.3947677254.

The spelling of 769569421 in words is "seven hundred sixty-nine million, five hundred sixty-nine thousand, four hundred twenty-one".