61349831 has 2 divisors, whose sum is σ = 61349832. Its totient is φ = 61349830.

The previous prime is 61349767. The next prime is 61349843. The reversal of 61349831 is 13894316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61349831 - 2⁶ = 61349767 is a prime.

It is a super-2 number, since 2×61349831² = 7527603527457122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61349791 and 61349800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61349851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30674915 + 30674916.

It is an arithmetic number, because the mean of its divisors is an integer number (30674916).

Almost surely, 2^61349831 is an apocalyptic number.

61349831 is a deficient number, since it is larger than the sum of its proper divisors (1).

61349831 is an equidigital number, since it uses as much as digits as its factorization.

61349831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 61349831 is about 7832.6132931481. The cubic root of 61349831 is about 394.4008027686.

The spelling of 61349831 in words is "sixty-one million, three hundred forty-nine thousand, eight hundred thirty-one".