620651001 has 8 divisors (see below), whose sum is σ = 828558304. Its totient is φ = 413255520.

The previous prime is 620650981. The next prime is 620651029. The reversal of 620651001 is 100156026.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620651001 - 2⁶ = 620650937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620651051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125116 + ... + 129981.

It is an arithmetic number, because the mean of its divisors is an integer number (103569788).

Almost surely, 2^620651001 is an apocalyptic number.

It is an amenable number.

620651001 is a deficient number, since it is larger than the sum of its proper divisors (207907303).

620651001 is a wasteful number, since it uses less digits than its factorization.

620651001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255911.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 620651001 is about 24912.8681809221. The cubic root of 620651001 is about 853.0002400556. Note that the first 3 decimals are identical.

The spelling of 620651001 in words is "six hundred twenty million, six hundred fifty-one thousand, one".