50401669 has 4 divisors (see below), whose sum is σ = 51631020. Its totient is φ = 49172320.

The previous prime is 50401649. The next prime is 50401721. The reversal of 50401669 is 96610405.

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 21511044 + 28890625 = 4638^2 + 5375^2 .

It is a cyclic number.

It is not a de Polignac number, because 50401669 - 2⁷ = 50401541 is a prime.

It is a super-2 number, since 2×50401669² = 5080656475971122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50401669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50401619) 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, 614614 + ... + 614695.

It is an arithmetic number, because the mean of its divisors is an integer number (12907755).

Almost surely, 2^50401669 is an apocalyptic number.

It is an amenable number.

50401669 is a deficient number, since it is larger than the sum of its proper divisors (1229351).

50401669 is a wasteful number, since it uses less digits than its factorization.

50401669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229350.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 50401669 is about 7099.4132856173. The cubic root of 50401669 is about 369.3870274265.

The spelling of 50401669 in words is "fifty million, four hundred one thousand, six hundred sixty-nine".