61916369 has 2 divisors, whose sum is σ = 61916370. Its totient is φ = 61916368.

The previous prime is 61916359. The next prime is 61916377. The reversal of 61916369 is 96361916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55726225 + 6190144 = 7465^2 + 2488^2 .

It is a cyclic number.

It is not a de Polignac number, because 61916369 - 2⁴ = 61916353 is a prime.

It is a super-2 number, since 2×61916369² = 7667273500288322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61916339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30958184 + 30958185.

It is an arithmetic number, because the mean of its divisors is an integer number (30958185).

Almost surely, 2^61916369 is an apocalyptic number.

It is an amenable number.

61916369 is a deficient number, since it is larger than the sum of its proper divisors (1).

61916369 is an equidigital number, since it uses as much as digits as its factorization.

61916369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 61916369 is about 7868.6955081513. The cubic root of 61916369 is about 395.6111225954.

The spelling of 61916369 in words is "sixty-one million, nine hundred sixteen thousand, three hundred sixty-nine".