1616423197 has 2 divisors, whose sum is σ = 1616423198. Its totient is φ = 1616423196.

The previous prime is 1616423153. The next prime is 1616423209. The reversal of 1616423197 is 7913246161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1317617401 + 298805796 = 36299^2 + 17286^2 .

It is an emirp because it is prime and its reverse (7913246161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1616423197 - 2⁷ = 1616423069 is a prime.

It is a super-2 number, since 2×1616423197² = 5225647903599401618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1616423147) 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 as a sum of consecutive naturals, namely, 808211598 + 808211599.

It is an arithmetic number, because the mean of its divisors is an integer number (808211599).

Almost surely, 2^1616423197 is an apocalyptic number.

It is an amenable number.

1616423197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616423197 is an equidigital number, since it uses as much as digits as its factorization.

1616423197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 1616423197 is about 40204.7658493368. The cubic root of 1616423197 is about 1173.5952905898.

The spelling of 1616423197 in words is "one billion, six hundred sixteen million, four hundred twenty-three thousand, one hundred ninety-seven".