620122731 has 4 divisors (see below), whose sum is σ = 826830312. Its totient is φ = 413415152.

The previous prime is 620122717. The next prime is 620122751. The reversal of 620122731 is 137221026.

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 620122731 - 2⁹ = 620122219 is a prime.

It is a super-2 number, since 2×620122731² = 769104403005796722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (620122751) 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, 103353786 + ... + 103353791.

It is an arithmetic number, because the mean of its divisors is an integer number (206707578).

Almost surely, 2^620122731 is an apocalyptic number.

620122731 is a deficient number, since it is larger than the sum of its proper divisors (206707581).

620122731 is a wasteful number, since it uses less digits than its factorization.

620122731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206707580.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 620122731 is about 24902.2635718121. The cubic root of 620122731 is about 852.7581596464.

Adding to 620122731 its reverse (137221026), we get a palindrome (757343757).

The spelling of 620122731 in words is "six hundred twenty million, one hundred twenty-two thousand, seven hundred thirty-one".