620937321 has 4 divisors (see below), whose sum is σ = 827916432. Its totient is φ = 413958212.

The previous prime is 620937319. The next prime is 620937323. The reversal of 620937321 is 123739026.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (620937319) and next prime (620937323).

It is a cyclic number.

It is not a de Polignac number, because 620937321 - 2¹ = 620937319 is a prime.

It is a super-2 number, since 2×620937321² = 771126313221314082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (620937323) 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, 103489551 + ... + 103489556.

It is an arithmetic number, because the mean of its divisors is an integer number (206979108).

Almost surely, 2^620937321 is an apocalyptic number.

It is an amenable number.

620937321 is a deficient number, since it is larger than the sum of its proper divisors (206979111).

620937321 is a wasteful number, since it uses less digits than its factorization.

620937321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206979110.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 620937321 is about 24918.6139462050. The cubic root of 620937321 is about 853.1313891671.

The spelling of 620937321 in words is "six hundred twenty million, nine hundred thirty-seven thousand, three hundred twenty-one".