61388353 has 8 divisors (see below), whose sum is σ = 66261608. Its totient is φ = 56536704.

The previous prime is 61388351. The next prime is 61388381. The reversal of 61388353 is 35388316.

It can be written as a sum of positive squares in 4 ways, for example, as 15460624 + 45927729 = 3932^2 + 6777^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61388353 - 2¹ = 61388351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61388351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775 + ... + 11107.

It is an arithmetic number, because the mean of its divisors is an integer number (8282701).

Almost surely, 2^61388353 is an apocalyptic number.

It is an amenable number.

61388353 is a deficient number, since it is larger than the sum of its proper divisors (4873255).

61388353 is a wasteful number, since it uses less digits than its factorization.

61388353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10803.

The product of its digits is 51840, while the sum is 37.

The square root of 61388353 is about 7835.0719843534. The cubic root of 61388353 is about 394.4833345302.

Subtracting from 61388353 its sum of digits (37), we obtain a palindrome (61388316).

The spelling of 61388353 in words is "sixty-one million, three hundred eighty-eight thousand, three hundred fifty-three".