61356133 has 2 divisors, whose sum is σ = 61356134. Its totient is φ = 61356132.

The previous prime is 61356091. The next prime is 61356137. The reversal of 61356133 is 33165316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38526849 + 22829284 = 6207^2 + 4778^2 .

It is a cyclic number.

It is not a de Polignac number, because 61356133 - 2²⁵ = 27801701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61356137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30678066 + 30678067.

It is an arithmetic number, because the mean of its divisors is an integer number (30678067).

Almost surely, 2^61356133 is an apocalyptic number.

It is an amenable number.

61356133 is a deficient number, since it is larger than the sum of its proper divisors (1).

61356133 is an equidigital number, since it uses as much as digits as its factorization.

61356133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 28.

The square root of 61356133 is about 7833.0155751154. The cubic root of 61356133 is about 394.4143069012.

The spelling of 61356133 in words is "sixty-one million, three hundred fifty-six thousand, one hundred thirty-three".