620638547 has 4 divisors (see below), whose sum is σ = 620758056. Its totient is φ = 620519040.

The previous prime is 620638531. The next prime is 620638549. The reversal of 620638547 is 745836026.

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 620638547 - 2⁴ = 620638531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620638549) 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, 51593 + ... + 62474.

It is an arithmetic number, because the mean of its divisors is an integer number (155189514).

Almost surely, 2^620638547 is an apocalyptic number.

620638547 is a deficient number, since it is larger than the sum of its proper divisors (119509).

620638547 is a wasteful number, since it uses less digits than its factorization.

620638547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119508.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 620638547 is about 24912.6182285203. The cubic root of 620638547 is about 852.9945345754.

The spelling of 620638547 in words is "six hundred twenty million, six hundred thirty-eight thousand, five hundred forty-seven".