1616281399 has 2 divisors, whose sum is σ = 1616281400. Its totient is φ = 1616281398.

The previous prime is 1616281363. The next prime is 1616281483. The reversal of 1616281399 is 9931826161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1616281399 - 2¹⁵ = 1616248631 is a prime.

It is a super-2 number, since 2×1616281399² = 5224731121506794402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1616281339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808140699 + 808140700.

It is an arithmetic number, because the mean of its divisors is an integer number (808140700).

Almost surely, 2^1616281399 is an apocalyptic number.

1616281399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616281399 is an equidigital number, since it uses as much as digits as its factorization.

1616281399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 46.

The square root of 1616281399 is about 40203.0023630077. The cubic root of 1616281399 is about 1173.5609723635.

The spelling of 1616281399 in words is "one billion, six hundred sixteen million, two hundred eighty-one thousand, three hundred ninety-nine".