620905899 has 4 divisors (see below), whose sum is σ = 827874536. Its totient is φ = 413937264.

The previous prime is 620905867. The next prime is 620905931. The reversal of 620905899 is 998509026.

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

It is an interprime number because it is at equal distance from previous prime (620905867) and next prime (620905931).

It is not a de Polignac number, because 620905899 - 2⁵ = 620905867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620905849) 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, 103484314 + ... + 103484319.

It is an arithmetic number, because the mean of its divisors is an integer number (206968634).

Almost surely, 2^620905899 is an apocalyptic number.

620905899 is a deficient number, since it is larger than the sum of its proper divisors (206968637).

620905899 is a wasteful number, since it uses less digits than its factorization.

620905899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206968636.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 620905899 is about 24917.9834456964. The cubic root of 620905899 is about 853.1169982639.

The spelling of 620905899 in words is "six hundred twenty million, nine hundred five thousand, eight hundred ninety-nine".