61131383 has 2 divisors, whose sum is σ = 61131384. Its totient is φ = 61131382.

The previous prime is 61131319. The next prime is 61131461. The reversal of 61131383 is 38313116.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61131383 - 2⁶ = 61131319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61131583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30565691 + 30565692.

It is an arithmetic number, because the mean of its divisors is an integer number (30565692).

Almost surely, 2^61131383 is an apocalyptic number.

61131383 is a deficient number, since it is larger than the sum of its proper divisors (1).

61131383 is an equidigital number, since it uses as much as digits as its factorization.

61131383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 61131383 is about 7818.6560865663. The cubic root of 61131383 is about 393.9321324865.

Adding to 61131383 its reverse (38313116), we get a palindrome (99444499).

The spelling of 61131383 in words is "sixty-one million, one hundred thirty-one thousand, three hundred eighty-three".