61162909 has 2 divisors, whose sum is σ = 61162910. Its totient is φ = 61162908.

The previous prime is 61162867. The next prime is 61162921. The reversal of 61162909 is 90926116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57912100 + 3250809 = 7610^2 + 1803^2 .

It is a cyclic number.

It is not a de Polignac number, because 61162909 - 2¹⁹ = 60638621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61162009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30581454 + 30581455.

It is an arithmetic number, because the mean of its divisors is an integer number (30581455).

Almost surely, 2^61162909 is an apocalyptic number.

It is an amenable number.

61162909 is a deficient number, since it is larger than the sum of its proper divisors (1).

61162909 is an equidigital number, since it uses as much as digits as its factorization.

61162909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 61162909 is about 7820.6719020810. The cubic root of 61162909 is about 393.9998389548. Note that the first 3 decimals are identical.

It can be divided in two parts, 6116 and 2909, that added together give a square (9025 = 95²).

The spelling of 61162909 in words is "sixty-one million, one hundred sixty-two thousand, nine hundred nine".