61916357 has 2 divisors, whose sum is σ = 61916358. Its totient is φ = 61916356.

The previous prime is 61916353. The next prime is 61916359. The reversal of 61916357 is 75361916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33709636 + 28206721 = 5806^2 + 5311^2 .

It is a cyclic number.

It is not a de Polignac number, because 61916357 - 2² = 61916353 is a prime.

Together with 61916359, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61916357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61916353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30958178 + 30958179.

It is an arithmetic number, because the mean of its divisors is an integer number (30958179).

Almost surely, 2^61916357 is an apocalyptic number.

It is an amenable number.

61916357 is a deficient number, since it is larger than the sum of its proper divisors (1).

61916357 is an equidigital number, since it uses as much as digits as its factorization.

61916357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 61916357 is about 7868.6947456360. The cubic root of 61916357 is about 395.6110970376.

The spelling of 61916357 in words is "sixty-one million, nine hundred sixteen thousand, three hundred fifty-seven".