1613617231 has 4 divisors (see below), whose sum is σ = 1613700792. Its totient is φ = 1613533672.

The previous prime is 1613617189. The next prime is 1613617253. The reversal of 1613617231 is 1327163161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1613617231 - 2¹¹ = 1613615183 is a prime.

It is a super-2 number, since 2×1613617231² = 5207521136360214722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1613617193 and 1613617202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613617531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3660 + ... + 56926.

It is an arithmetic number, because the mean of its divisors is an integer number (403425198).

Almost surely, 2^1613617231 is an apocalyptic number.

1613617231 is a deficient number, since it is larger than the sum of its proper divisors (83561).

1613617231 is an equidigital number, since it uses as much as digits as its factorization.

1613617231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83560.

The product of its digits is 4536, while the sum is 31.

The square root of 1613617231 is about 40169.8547545295. The cubic root of 1613617231 is about 1172.9158118040.

The spelling of 1613617231 in words is "one billion, six hundred thirteen million, six hundred seventeen thousand, two hundred thirty-one".