620962381 has 8 divisors (see below), whose sum is σ = 668984120. Its totient is φ = 572977152.

The previous prime is 620962369. The next prime is 620962387. The reversal of 620962381 is 183269026.

It can be written as a sum of positive squares in 4 ways, for example, as 79655625 + 541306756 = 8925^2 + 23266^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 620962381 - 2¹⁵ = 620929613 is a prime.

It is a super-2 number, since 2×620962381² = 771188557234378322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620962381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620962387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33661 + ... + 48733.

It is an arithmetic number, because the mean of its divisors is an integer number (83623015).

Almost surely, 2^620962381 is an apocalyptic number.

It is an amenable number.

620962381 is a deficient number, since it is larger than the sum of its proper divisors (48021739).

620962381 is a wasteful number, since it uses less digits than its factorization.

620962381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18255.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 620962381 is about 24919.1167780883. The cubic root of 620962381 is about 853.1428660018.

The spelling of 620962381 in words is "six hundred twenty million, nine hundred sixty-two thousand, three hundred eighty-one".