616695421 has 8 divisors (see below), whose sum is σ = 635637888. Its totient is φ = 598038000.

The previous prime is 616695419. The next prime is 616695461. The reversal of 616695421 is 124596616.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 616695421 - 2¹ = 616695419 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 (616695461) 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, 66865 + ... + 75526.

It is an arithmetic number, because the mean of its divisors is an integer number (79454736).

Almost surely, 2^616695421 is an apocalyptic number.

616695421 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

616695421 is a deficient number, since it is larger than the sum of its proper divisors (18942467).

616695421 is a wasteful number, since it uses less digits than its factorization.

616695421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142523.

The product of its digits is 77760, while the sum is 40.

The square root of 616695421 is about 24833.3529955179. The cubic root of 616695421 is about 851.1842413605.

The spelling of 616695421 in words is "six hundred sixteen million, six hundred ninety-five thousand, four hundred twenty-one".