61388903 has 2 divisors, whose sum is σ = 61388904. Its totient is φ = 61388902.

The previous prime is 61388881. The next prime is 61388941. The reversal of 61388903 is 30988316.

It is an a-pointer prime, because the next prime (61388941) can be obtained adding 61388903 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61388903 - 2⁸ = 61388647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61388953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30694451 + 30694452.

It is an arithmetic number, because the mean of its divisors is an integer number (30694452).

Almost surely, 2^61388903 is an apocalyptic number.

61388903 is a deficient number, since it is larger than the sum of its proper divisors (1).

61388903 is an equidigital number, since it uses as much as digits as its factorization.

61388903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 61388903 is about 7835.1070828675. The cubic root of 61388903 is about 394.4845126320.

The spelling of 61388903 in words is "sixty-one million, three hundred eighty-eight thousand, nine hundred three".