621162013 has 4 divisors (see below), whose sum is σ = 636312348. Its totient is φ = 606011680.

The previous prime is 621161993. The next prime is 621162023. The reversal of 621162013 is 310261126.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30769209 + 590392804 = 5547^2 + 24298^2 .

It is a cyclic number.

It is not a de Polignac number, because 621162013 - 2²¹ = 619064861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621162023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7575106 + ... + 7575187.

It is an arithmetic number, because the mean of its divisors is an integer number (159078087).

Almost surely, 2^621162013 is an apocalyptic number.

It is an amenable number.

621162013 is a deficient number, since it is larger than the sum of its proper divisors (15150335).

621162013 is a wasteful number, since it uses less digits than its factorization.

621162013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15150334.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 621162013 is about 24923.1220556334. The cubic root of 621162013 is about 853.2342812919.

The spelling of 621162013 in words is "six hundred twenty-one million, one hundred sixty-two thousand, thirteen".