407798621 has 4 divisors (see below), whose sum is σ = 407851932. Its totient is φ = 407745312.

The previous prime is 407798593. The next prime is 407798639. The reversal of 407798621 is 126897704.

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 143736121 + 264062500 = 11989^2 + 16250^2 .

It is a cyclic number.

It is not a de Polignac number, because 407798621 - 2⁶ = 407798557 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 (407798681) 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, 12770 + ... + 31283.

It is an arithmetic number, because the mean of its divisors is an integer number (101962983).

Almost surely, 2^407798621 is an apocalyptic number.

It is an amenable number.

407798621 is a deficient number, since it is larger than the sum of its proper divisors (53311).

407798621 is an equidigital number, since it uses as much as digits as its factorization.

407798621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53310.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 407798621 is about 20194.0243884175. The cubic root of 407798621 is about 741.5639076474.

The spelling of 407798621 in words is "four hundred seven million, seven hundred ninety-eight thousand, six hundred twenty-one".