769821401 has 4 divisors (see below), whose sum is σ = 769935012. Its totient is φ = 769707792.

The previous prime is 769821383. The next prime is 769821407. The reversal of 769821401 is 104128967.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 181710400 + 588111001 = 13480^2 + 24251^2 .

It is a cyclic number.

It is not a de Polignac number, because 769821401 - 2¹⁸ = 769559257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (769821407) 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, 45950 + ... + 60423.

It is an arithmetic number, because the mean of its divisors is an integer number (192483753).

Almost surely, 2^769821401 is an apocalyptic number.

It is an amenable number.

769821401 is a deficient number, since it is larger than the sum of its proper divisors (113611).

769821401 is a wasteful number, since it uses less digits than its factorization.

769821401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113610.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 769821401 is about 27745.6555337948. The cubic root of 769821401 is about 916.4947751448.

The spelling of 769821401 in words is "seven hundred sixty-nine million, eight hundred twenty-one thousand, four hundred one".