61917319 has 2 divisors, whose sum is σ = 61917320. Its totient is φ = 61917318.

The previous prime is 61917299. The next prime is 61917329. The reversal of 61917319 is 91371916.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61917319 is a prime.

It is a super-2 number, since 2×61917319² = 7667508784295522, 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 (61917329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30958659 + 30958660.

It is an arithmetic number, because the mean of its divisors is an integer number (30958660).

Almost surely, 2^61917319 is an apocalyptic number.

61917319 is a deficient number, since it is larger than the sum of its proper divisors (1).

61917319 is an equidigital number, since it uses as much as digits as its factorization.

61917319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 37.

The square root of 61917319 is about 7868.7558737071. The cubic root of 61917319 is about 395.6131459087.

The spelling of 61917319 in words is "sixty-one million, nine hundred seventeen thousand, three hundred nineteen".