61388023 has 2 divisors, whose sum is σ = 61388024. Its totient is φ = 61388022.

The previous prime is 61388009. The next prime is 61388039. The reversal of 61388023 is 32088316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61388023 - 2²¹ = 59290871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61388083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30694011 + 30694012.

It is an arithmetic number, because the mean of its divisors is an integer number (30694012).

Almost surely, 2^61388023 is an apocalyptic number.

61388023 is a deficient number, since it is larger than the sum of its proper divisors (1).

61388023 is an equidigital number, since it uses as much as digits as its factorization.

61388023 is an evil number, because the sum of its binary digits is even.

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

The square root of 61388023 is about 7835.0509251695. The cubic root of 61388023 is about 394.4826276657.

It can be divided in two parts, 6138 and 8023, that added together give a square (14161 = 119²).

The spelling of 61388023 in words is "sixty-one million, three hundred eighty-eight thousand, twenty-three".