50608721 has 4 divisors (see below), whose sum is σ = 51785712. Its totient is φ = 49431732.

The previous prime is 50608699. The next prime is 50608757. The reversal of 50608721 is 12780605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12780605 = 5 ⋅2556121.

It is a cyclic number.

It is not a de Polignac number, because 50608721 - 2¹⁴ = 50592337 is a prime.

It is a super-2 number, since 2×50608721² = 5122485282511682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50608781) 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, 588431 + ... + 588516.

It is an arithmetic number, because the mean of its divisors is an integer number (12946428).

Almost surely, 2^50608721 is an apocalyptic number.

It is an amenable number.

50608721 is a deficient number, since it is larger than the sum of its proper divisors (1176991).

50608721 is a wasteful number, since it uses less digits than its factorization.

50608721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176990.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 50608721 is about 7113.9806718883. The cubic root of 50608721 is about 369.8921550800.

The spelling of 50608721 in words is "fifty million, six hundred eight thousand, seven hundred twenty-one".