61439503 has 2 divisors, whose sum is σ = 61439504. Its totient is φ = 61439502.

The previous prime is 61439471. The next prime is 61439527. The reversal of 61439503 is 30593416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61439503 - 2⁵ = 61439471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61439533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30719751 + 30719752.

It is an arithmetic number, because the mean of its divisors is an integer number (30719752).

Almost surely, 2^61439503 is an apocalyptic number.

61439503 is a deficient number, since it is larger than the sum of its proper divisors (1).

61439503 is an equidigital number, since it uses as much as digits as its factorization.

61439503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 61439503 is about 7838.3354738108. The cubic root of 61439503 is about 394.5928679079.

The spelling of 61439503 in words is "sixty-one million, four hundred thirty-nine thousand, five hundred three".