61491119 has 2 divisors, whose sum is σ = 61491120. Its totient is φ = 61491118.

The previous prime is 61491109. The next prime is 61491203. The reversal of 61491119 is 91119416.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61491119 is a prime.

It is a super-2 number, since 2×61491119² = 7562315431744322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61491109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30745559 + 30745560.

It is an arithmetic number, because the mean of its divisors is an integer number (30745560).

Almost surely, 2^61491119 is an apocalyptic number.

61491119 is a deficient number, since it is larger than the sum of its proper divisors (1).

61491119 is an equidigital number, since it uses as much as digits as its factorization.

61491119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 32.

The square root of 61491119 is about 7841.6273183568. The cubic root of 61491119 is about 394.7033375761.

The spelling of 61491119 in words is "sixty-one million, four hundred ninety-one thousand, one hundred nineteen".