61424491 has 2 divisors, whose sum is σ = 61424492. Its totient is φ = 61424490.

The previous prime is 61424453. The next prime is 61424497. The reversal of 61424491 is 19442416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61424491 - 2¹⁵ = 61391723 is a prime.

It is not a weakly prime, because it can be changed into another prime (61424497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30712245 + 30712246.

It is an arithmetic number, because the mean of its divisors is an integer number (30712246).

Almost surely, 2^61424491 is an apocalyptic number.

61424491 is a deficient number, since it is larger than the sum of its proper divisors (1).

61424491 is an equidigital number, since it uses as much as digits as its factorization.

61424491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 61424491 is about 7837.3778140396. The cubic root of 61424491 is about 394.5607272906.

The spelling of 61424491 in words is "sixty-one million, four hundred twenty-four thousand, four hundred ninety-one".