621952103 has 4 divisors (see below), whose sum is σ = 623199000. Its totient is φ = 620705208.

The previous prime is 621952073. The next prime is 621952139. The reversal of 621952103 is 301259126.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621952103 is a prime.

It is a super-2 number, since 2×621952103² = 773648836852245218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621952153) 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, 622700 + ... + 623697.

It is an arithmetic number, because the mean of its divisors is an integer number (155799750).

Almost surely, 2^621952103 is an apocalyptic number.

621952103 is a deficient number, since it is larger than the sum of its proper divisors (1246897).

621952103 is a wasteful number, since it uses less digits than its factorization.

621952103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246896.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 621952103 is about 24938.9675608274. The cubic root of 621952103 is about 853.5958864980.

The spelling of 621952103 in words is "six hundred twenty-one million, nine hundred fifty-two thousand, one hundred three".