61615393 has 6 divisors (see below), whose sum is σ = 71675106. Its totient is φ = 52813152.

The previous prime is 61615391. The next prime is 61615417. The reversal of 61615393 is 39351616.

It can be written as a sum of positive squares in only one way, i.e., 34492129 + 27123264 = 5873^2 + 5208^2 .

It is not a de Polignac number, because 61615393 - 2¹ = 61615391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61615391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628680 + ... + 628777.

It is an arithmetic number, because the mean of its divisors is an integer number (11945851).

Almost surely, 2^61615393 is an apocalyptic number.

It is an amenable number.

61615393 is a deficient number, since it is larger than the sum of its proper divisors (10059713).

61615393 is a wasteful number, since it uses less digits than its factorization.

61615393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257471 (or 1257464 counting only the distinct ones).

The product of its digits is 14580, while the sum is 34.

The square root of 61615393 is about 7849.5473117881. The cubic root of 61615393 is about 394.9690580901.

The spelling of 61615393 in words is "sixty-one million, six hundred fifteen thousand, three hundred ninety-three".