61913113 has 2 divisors, whose sum is σ = 61913114. Its totient is φ = 61913112.

The previous prime is 61913081. The next prime is 61913123. The reversal of 61913113 is 31131916.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57108249 + 4804864 = 7557^2 + 2192^2 .

It is a cyclic number.

It is not a de Polignac number, because 61913113 - 2⁵ = 61913081 is a prime.

It is a super-2 number, since 2×61913113² = 7666467122701538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61913123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30956556 + 30956557.

It is an arithmetic number, because the mean of its divisors is an integer number (30956557).

Almost surely, 2^61913113 is an apocalyptic number.

It is an amenable number.

61913113 is a deficient number, since it is larger than the sum of its proper divisors (1).

61913113 is an equidigital number, since it uses as much as digits as its factorization.

61913113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 25.

The square root of 61913113 is about 7868.4886096378. The cubic root of 61913113 is about 395.6041877981.

It can be divided in two parts, 61913 and 113, that added together give a palindrome (62026).

The spelling of 61913113 in words is "sixty-one million, nine hundred thirteen thousand, one hundred thirteen".