61490969 has 2 divisors, whose sum is σ = 61490970. Its totient is φ = 61490968.

The previous prime is 61490963. The next prime is 61490977. The reversal of 61490969 is 96909416.

61490969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49519369 + 11971600 = 7037^2 + 3460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61490969 is a prime.

It is a super-2 number, since 2×61490969² = 7562278537117922, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (61490963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30745484 + 30745485.

It is an arithmetic number, because the mean of its divisors is an integer number (30745485).

Almost surely, 2^61490969 is an apocalyptic number.

It is an amenable number.

61490969 is a deficient number, since it is larger than the sum of its proper divisors (1).

61490969 is an equidigital number, since it uses as much as digits as its factorization.

61490969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 61490969 is about 7841.6177540097. The cubic root of 61490969 is about 394.7030166325.

The spelling of 61490969 in words is "sixty-one million, four hundred ninety thousand, nine hundred sixty-nine".