61388973 has 12 divisors (see below), whose sum is σ = 89095968. Its totient is φ = 40730760.

The previous prime is 61388953. The next prime is 61388983. The reversal of 61388973 is 37988316.

It is a happy number.

It is not a de Polignac number, because 61388973 - 2⁵ = 61388941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61388903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14265 + ... + 18062.

It is an arithmetic number, because the mean of its divisors is an integer number (7424664).

Almost surely, 2^61388973 is an apocalyptic number.

It is an amenable number.

61388973 is a deficient number, since it is larger than the sum of its proper divisors (27706995).

61388973 is a wasteful number, since it uses less digits than its factorization.

61388973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32544 (or 32541 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 61388973 is about 7835.1115499398. Note that the first 3 decimals coincide. The cubic root of 61388973 is about 394.4846625717.

The spelling of 61388973 in words is "sixty-one million, three hundred eighty-eight thousand, nine hundred seventy-three".