620820047 has 4 divisors (see below), whose sum is σ = 621066720. Its totient is φ = 620573376.

The previous prime is 620820001. The next prime is 620820049. The reversal of 620820047 is 740028026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740028026 = 2 ⋅370014013.

It is a de Polignac number, because none of the positive numbers 2^k-620820047 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 (620820049) 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, 119522 + ... + 124607.

It is an arithmetic number, because the mean of its divisors is an integer number (155266680).

Almost surely, 2^620820047 is an apocalyptic number.

620820047 is a deficient number, since it is larger than the sum of its proper divisors (246673).

620820047 is a wasteful number, since it uses less digits than its factorization.

620820047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246672.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 620820047 is about 24916.2606945745. The cubic root of 620820047 is about 853.0776765907.

The spelling of 620820047 in words is "six hundred twenty million, eight hundred twenty thousand, forty-seven".