61512993 has 8 divisors (see below), whose sum is σ = 91130400. Its totient is φ = 41008644.

The previous prime is 61512991. The next prime is 61513003. The reversal of 61512993 is 39921516.

61512993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61512993 - 2¹ = 61512991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61512991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139103 + ... + 1139156.

It is an arithmetic number, because the mean of its divisors is an integer number (11391300).

Almost surely, 2^61512993 is an apocalyptic number.

It is an amenable number.

61512993 is a deficient number, since it is larger than the sum of its proper divisors (29617407).

61512993 is a wasteful number, since it uses less digits than its factorization.

61512993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278268 (or 2278262 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 61512993 is about 7843.0219303531. The cubic root of 61512993 is about 394.7501341293.

The spelling of 61512993 in words is "sixty-one million, five hundred twelve thousand, nine hundred ninety-three".