620617207 has 4 divisors (see below), whose sum is σ = 709276816. Its totient is φ = 531957600.

The previous prime is 620617201. The next prime is 620617219. The reversal of 620617207 is 702716026.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620617207 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 (620617201) 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, 44329794 + ... + 44329807.

It is an arithmetic number, because the mean of its divisors is an integer number (177319204).

Almost surely, 2^620617207 is an apocalyptic number.

620617207 is a deficient number, since it is larger than the sum of its proper divisors (88659609).

620617207 is an equidigital number, since it uses as much as digits as its factorization.

620617207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88659608.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 620617207 is about 24912.1899278245. The cubic root of 620617207 is about 852.9847580250.

The spelling of 620617207 in words is "six hundred twenty million, six hundred seventeen thousand, two hundred seven".