616491213 has 24 divisors (see below), whose sum is σ = 942452928. Its totient is φ = 357057792.

The previous prime is 616491191. The next prime is 616491217. The reversal of 616491213 is 312194616.

It is not a de Polignac number, because 616491213 - 2²⁹ = 79620301 is a prime.

It is a super-2 number, since 2×616491213² = 760122831412422738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616491217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27145 + ... + 44382.

It is an arithmetic number, because the mean of its divisors is an integer number (39268872).

Almost surely, 2^616491213 is an apocalyptic number.

It is an amenable number.

616491213 is a deficient number, since it is larger than the sum of its proper divisors (325961715).

616491213 is a wasteful number, since it uses less digits than its factorization.

616491213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71573 (or 71560 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 616491213 is about 24829.2410878786. The cubic root of 616491213 is about 851.0902793522.

It can be divided in two parts, 6 and 16491213, that multiplied together give a triangular number (98947278 = T₁₄₀₆₇).

The spelling of 616491213 in words is "six hundred sixteen million, four hundred ninety-one thousand, two hundred thirteen".