61232491 has 2 divisors, whose sum is σ = 61232492. Its totient is φ = 61232490.

The previous prime is 61232489. The next prime is 61232513. The reversal of 61232491 is 19423216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61232491 - 2¹ = 61232489 is a prime.

Together with 61232489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61232441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30616245 + 30616246.

It is an arithmetic number, because the mean of its divisors is an integer number (30616246).

Almost surely, 2^61232491 is an apocalyptic number.

61232491 is a deficient number, since it is larger than the sum of its proper divisors (1).

61232491 is an equidigital number, since it uses as much as digits as its factorization.

61232491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 61232491 is about 7825.1192323184. The cubic root of 61232491 is about 394.1491936725.

It can be divided in two parts, 6123249 and 1, that added together give a triangular number (6123250 = T₃₄₉₉).

The spelling of 61232491 in words is "sixty-one million, two hundred thirty-two thousand, four hundred ninety-one".