621794105 has 12 divisors (see below), whose sum is σ = 749029932. Its totient is φ = 495524160.

The previous prime is 621794081. The next prime is 621794113. The reversal of 621794105 is 501497126.

It can be written as a sum of positive squares in 6 ways, for example, as 27994681 + 593799424 = 5291^2 + 24368^2 .

It is not a de Polignac number, because 621794105 - 2⁸ = 621793849 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608495 + ... + 609515.

It is an arithmetic number, because the mean of its divisors is an integer number (62419161).

Almost surely, 2^621794105 is an apocalyptic number.

It is an amenable number.

621794105 is a deficient number, since it is larger than the sum of its proper divisors (127235827).

621794105 is an equidigital number, since it uses as much as digits as its factorization.

621794105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724 (or 1375 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 621794105 is about 24935.7996663432. The cubic root of 621794105 is about 853.5235991176.

The spelling of 621794105 in words is "six hundred twenty-one million, seven hundred ninety-four thousand, one hundred five".