1617137939 has 2 divisors, whose sum is σ = 1617137940. Its totient is φ = 1617137938.

The previous prime is 1617137897. The next prime is 1617137941. The reversal of 1617137939 is 9397317161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1617137939 is a prime.

It is a super-2 number, since 2×1617137939² = 5230270227506335442, which contains 22 as substring.

Together with 1617137941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1617137893 and 1617137902.

It is not a weakly prime, because it can be changed into another prime (1617137969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808568969 + 808568970.

It is an arithmetic number, because the mean of its divisors is an integer number (808568970).

Almost surely, 2^1617137939 is an apocalyptic number.

1617137939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617137939 is an equidigital number, since it uses as much as digits as its factorization.

1617137939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 47.

The square root of 1617137939 is about 40213.6536390316. The cubic root of 1617137939 is about 1173.7682432840.

The spelling of 1617137939 in words is "one billion, six hundred seventeen million, one hundred thirty-seven thousand, nine hundred thirty-nine".