61605371 has 2 divisors, whose sum is σ = 61605372. Its totient is φ = 61605370.

The previous prime is 61605347. The next prime is 61605373. The reversal of 61605371 is 17350616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61605371 - 2⁶ = 61605307 is a prime.

Together with 61605373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61605373) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802685 + 30802686.

It is an arithmetic number, because the mean of its divisors is an integer number (30802686).

Almost surely, 2^61605371 is an apocalyptic number.

61605371 is a deficient number, since it is larger than the sum of its proper divisors (1).

61605371 is an equidigital number, since it uses as much as digits as its factorization.

61605371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 61605371 is about 7848.9089050644. The cubic root of 61605371 is about 394.9476424754.

Adding to 61605371 its reverse (17350616), we get a palindrome (78955987).

The spelling of 61605371 in words is "sixty-one million, six hundred five thousand, three hundred seventy-one".