61138113 has 4 divisors (see below), whose sum is σ = 81517488. Its totient is φ = 40758740.

The previous prime is 61138111. The next prime is 61138139. The reversal of 61138113 is 31183116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61138113 - 2¹ = 61138111 is a prime.

It is a super-2 number, since 2×61138113² = 7475737722401538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61138111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10189683 + ... + 10189688.

It is an arithmetic number, because the mean of its divisors is an integer number (20379372).

Almost surely, 2^61138113 is an apocalyptic number.

It is an amenable number.

61138113 is a deficient number, since it is larger than the sum of its proper divisors (20379375).

61138113 is a wasteful number, since it uses less digits than its factorization.

61138113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20379374.

The product of its digits is 432, while the sum is 24.

The square root of 61138113 is about 7819.0864555906. The cubic root of 61138113 is about 393.9465880511.

The spelling of 61138113 in words is "sixty-one million, one hundred thirty-eight thousand, one hundred thirteen".