407121716 has 6 divisors (see below), whose sum is σ = 712463010. Its totient is φ = 203560856.

The previous prime is 407121709. The next prime is 407121761. The reversal of 407121716 is 617121704.

It can be written as a sum of positive squares in only one way, i.e., 287438116 + 119683600 = 16954^2 + 10940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50890211 + ... + 50890218.

It is an arithmetic number, because the mean of its divisors is an integer number (118743835).

Almost surely, 2^407121716 is an apocalyptic number.

It is an amenable number.

407121716 is a deficient number, since it is larger than the sum of its proper divisors (305341294).

407121716 is a wasteful number, since it uses less digits than its factorization.

407121716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101780433 (or 101780431 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 407121716 is about 20177.2573953944. The cubic root of 407121716 is about 741.1533730628.

The spelling of 407121716 in words is "four hundred seven million, one hundred twenty-one thousand, seven hundred sixteen".