61158269 has 2 divisors, whose sum is σ = 61158270. Its totient is φ = 61158268.

The previous prime is 61158263. The next prime is 61158277. The reversal of 61158269 is 96285116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 3853369 = 7570^2 + 1963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61158269 is a prime.

It is a super-2 number, since 2×61158269² = 7480667734152722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61158263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30579134 + 30579135.

It is an arithmetic number, because the mean of its divisors is an integer number (30579135).

Almost surely, 2^61158269 is an apocalyptic number.

It is an amenable number.

61158269 is a deficient number, since it is larger than the sum of its proper divisors (1).

61158269 is an equidigital number, since it uses as much as digits as its factorization.

61158269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 61158269 is about 7820.3752467513. The cubic root of 61158269 is about 393.9898753701.

The spelling of 61158269 in words is "sixty-one million, one hundred fifty-eight thousand, two hundred sixty-nine".