620998699 has 4 divisors (see below), whose sum is σ = 622875160. Its totient is φ = 619122240.

The previous prime is 620998687. The next prime is 620998709. The reversal of 620998699 is 996899026.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 996899026 = 2 ⋅498449513.

It is a cyclic number.

It is not a de Polignac number, because 620998699 - 2⁵ = 620998667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620998649) 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, 937734 + ... + 938395.

It is an arithmetic number, because the mean of its divisors is an integer number (155718790).

Almost surely, 2^620998699 is an apocalyptic number.

620998699 is a deficient number, since it is larger than the sum of its proper divisors (1876461).

620998699 is a wasteful number, since it uses less digits than its factorization.

620998699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876460.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The square root of 620998699 is about 24919.8454850747. The cubic root of 620998699 is about 853.1594981626.

The spelling of 620998699 in words is "six hundred twenty million, nine hundred ninety-eight thousand, six hundred ninety-nine".