616748421 has 8 divisors (see below), whose sum is σ = 828247840. Its totient is φ = 408207312.

The previous prime is 616748411. The next prime is 616748443. The reversal of 616748421 is 124847616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 616748421 - 2¹¹ = 616746373 is a prime.

It is a super-2 number, since 2×616748421² = 760757229611986482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 616748421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616748401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739090 + ... + 739923.

It is an arithmetic number, because the mean of its divisors is an integer number (103530980).

Almost surely, 2^616748421 is an apocalyptic number.

It is an amenable number.

616748421 is a deficient number, since it is larger than the sum of its proper divisors (211499419).

616748421 is a wasteful number, since it uses less digits than its factorization.

616748421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479155.

The product of its digits is 64512, while the sum is 39.

The square root of 616748421 is about 24834.4200858405. The cubic root of 616748421 is about 851.2086248032.

The spelling of 616748421 in words is "six hundred sixteen million, seven hundred forty-eight thousand, four hundred twenty-one".