1361597831 has 4 divisors (see below), whose sum is σ = 1485379464. Its totient is φ = 1237816200.

The previous prime is 1361597801. The next prime is 1361597833. The reversal of 1361597831 is 1387951631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361597831 - 2⁶ = 1361597767 is a prime.

It is a super-2 number, since 2×1361597831² = 3707897306767809122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361597833) 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 in 3 ways as a sum of consecutive naturals, for example, 61890800 + ... + 61890821.

It is an arithmetic number, because the mean of its divisors is an integer number (371344866).

Almost surely, 2^1361597831 is an apocalyptic number.

1361597831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1361597831 is a deficient number, since it is larger than the sum of its proper divisors (123781633).

1361597831 is a wasteful number, since it uses less digits than its factorization.

1361597831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123781632.

The product of its digits is 136080, while the sum is 44.

The square root of 1361597831 is about 36899.8351080327. The cubic root of 1361597831 is about 1108.3653755424.

The spelling of 1361597831 in words is "one billion, three hundred sixty-one million, five hundred ninety-seven thousand, eight hundred thirty-one".