3020639 has 4 divisors (see below), whose sum is σ = 3179640. Its totient is φ = 2861640.

The previous prime is 3020617. The next prime is 3020651. The reversal of 3020639 is 9360203.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3020639 - 2¹² = 3016543 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3020239) 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, 79472 + ... + 79509.

It is an arithmetic number, because the mean of its divisors is an integer number (794910).

Almost surely, 2^3020639 is an apocalyptic number.

3020639 is a deficient number, since it is larger than the sum of its proper divisors (159001).

3020639 is a wasteful number, since it uses less digits than its factorization.

3020639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159000.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 3020639 is about 1737.9985615644. The cubic root of 3020639 is about 144.5549413328.

The spelling of 3020639 in words is "three million, twenty thousand, six hundred thirty-nine".