77046021 has 24 divisors (see below), whose sum is σ = 125064576. Its totient is φ = 45349920.

The previous prime is 77045993. The next prime is 77046029. The reversal of 77046021 is 12064077.

77046021 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 77046021 - 2¹⁰ = 77044997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77046029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11625 + ... + 17006.

It is an arithmetic number, because the mean of its divisors is an integer number (5211024).

Almost surely, 2^77046021 is an apocalyptic number.

It is an amenable number.

77046021 is a deficient number, since it is larger than the sum of its proper divisors (48018555).

77046021 is a wasteful number, since it uses less digits than its factorization.

77046021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28673 (or 28670 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 77046021 is about 8777.5862855343. The cubic root of 77046021 is about 425.5168263849.

The spelling of 77046021 in words is "seventy-seven million, forty-six thousand, twenty-one".