773340021 has 32 divisors (see below), whose sum is σ = 1180638720. Its totient is φ = 500032512.

The previous prime is 773340019. The next prime is 773340049. The reversal of 773340021 is 120043377.

It is not a de Polignac number, because 773340021 - 2¹ = 773340019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (773340011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140701 + ... + 146093.

It is an arithmetic number, because the mean of its divisors is an integer number (36894960).

Almost surely, 2^773340021 is an apocalyptic number.

It is an amenable number.

773340021 is a deficient number, since it is larger than the sum of its proper divisors (407298699).

773340021 is a wasteful number, since it uses less digits than its factorization.

773340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562 (or 5556 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 773340021 is about 27808.9917292950. The cubic root of 773340021 is about 917.8889929423. Note that the first 3 decimals are identical.

Adding to 773340021 its reverse (120043377), we get a palindrome (893383398).

The spelling of 773340021 in words is "seven hundred seventy-three million, three hundred forty thousand, twenty-one".