620358731 has 2 divisors, whose sum is σ = 620358732. Its totient is φ = 620358730.

The previous prime is 620358727. The next prime is 620358733. The reversal of 620358731 is 137853026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620358731 - 2² = 620358727 is a prime.

It is a super-2 number, since 2×620358731² = 769689910255860722, which contains 22 as substring.

Together with 620358733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 620358691 and 620358700.

It is not a weakly prime, because it can be changed into another prime (620358733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310179365 + 310179366.

It is an arithmetic number, because the mean of its divisors is an integer number (310179366).

Almost surely, 2^620358731 is an apocalyptic number.

620358731 is a deficient number, since it is larger than the sum of its proper divisors (1).

620358731 is an equidigital number, since it uses as much as digits as its factorization.

620358731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 620358731 is about 24907.0016461235. The cubic root of 620358731 is about 852.8663239345.

The spelling of 620358731 in words is "six hundred twenty million, three hundred fifty-eight thousand, seven hundred thirty-one".