620554742 has 4 divisors (see below), whose sum is σ = 930832116. Its totient is φ = 310277370.

The previous prime is 620554741. The next prime is 620554751. The reversal of 620554742 is 247455026.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620554741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155138684 + ... + 155138687.

It is an arithmetic number, because the mean of its divisors is an integer number (232708029).

Almost surely, 2^620554742 is an apocalyptic number.

620554742 is a deficient number, since it is larger than the sum of its proper divisors (310277374).

620554742 is a wasteful number, since it uses less digits than its factorization.

620554742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310277373.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 620554742 is about 24910.9361927648. The cubic root of 620554742 is about 852.9561394821.

The spelling of 620554742 in words is "six hundred twenty million, five hundred fifty-four thousand, seven hundred forty-two".