61172849 has 2 divisors, whose sum is σ = 61172850. Its totient is φ = 61172848.

The previous prime is 61172843. The next prime is 61172879. The reversal of 61172849 is 94827116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 20449 = 7820^2 + 143^2 .

It is a cyclic number.

It is not a de Polignac number, because 61172849 - 2⁸ = 61172593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61172843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30586424 + 30586425.

It is an arithmetic number, because the mean of its divisors is an integer number (30586425).

Almost surely, 2^61172849 is an apocalyptic number.

It is an amenable number.

61172849 is a deficient number, since it is larger than the sum of its proper divisors (1).

61172849 is an equidigital number, since it uses as much as digits as its factorization.

61172849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 61172849 is about 7821.3073715332. The cubic root of 61172849 is about 394.0211816625.

The spelling of 61172849 in words is "sixty-one million, one hundred seventy-two thousand, eight hundred forty-nine".