73077021 has 12 divisors (see below), whose sum is σ = 111111520. Its totient is φ = 46153800.

The previous prime is 73077019. The next prime is 73077031. The reversal of 73077021 is 12077037.

It is not a de Polignac number, because 73077021 - 2¹ = 73077019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73077031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213505 + ... + 213846.

Almost surely, 2^73077021 is an apocalyptic number.

It is an amenable number.

73077021 is a deficient number, since it is larger than the sum of its proper divisors (38034499).

73077021 is a wasteful number, since it uses less digits than its factorization.

73077021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427376 (or 427373 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 73077021 is about 8548.5098701470. The cubic root of 73077021 is about 418.0808528533.

The spelling of 73077021 in words is "seventy-three million, seventy-seven thousand, twenty-one".