61406039 has 2 divisors, whose sum is σ = 61406040. Its totient is φ = 61406038.

The previous prime is 61405999. The next prime is 61406041. The reversal of 61406039 is 93060416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61406039 - 2⁸ = 61405783 is a prime.

Together with 61406041, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61403039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30703019 + 30703020.

It is an arithmetic number, because the mean of its divisors is an integer number (30703020).

Almost surely, 2^61406039 is an apocalyptic number.

61406039 is a deficient number, since it is larger than the sum of its proper divisors (1).

61406039 is an equidigital number, since it uses as much as digits as its factorization.

61406039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 61406039 is about 7836.2005461831. The cubic root of 61406039 is about 394.5212144754.

The spelling of 61406039 in words is "sixty-one million, four hundred six thousand, thirty-nine".