1613640031 has 2 divisors, whose sum is σ = 1613640032. Its totient is φ = 1613640030.

The previous prime is 1613640023. The next prime is 1613640079. The reversal of 1613640031 is 1300463161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1613640031 - 2³ = 1613640023 is a prime.

It is a super-2 number, since 2×1613640031² = 5207668299291361922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1613639978 and 1613640005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1613640131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806820015 + 806820016.

It is an arithmetic number, because the mean of its divisors is an integer number (806820016).

Almost surely, 2^1613640031 is an apocalyptic number.

1613640031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613640031 is an equidigital number, since it uses as much as digits as its factorization.

1613640031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1613640031 is about 40170.1385484292. The cubic root of 1613640031 is about 1172.9213361118.

The spelling of 1613640031 in words is "one billion, six hundred thirteen million, six hundred forty thousand, thirty-one".