61140377 has 2 divisors, whose sum is σ = 61140378. Its totient is φ = 61140376.

The previous prime is 61140349. The next prime is 61140379. The reversal of 61140377 is 77304116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40246336 + 20894041 = 6344^2 + 4571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61140377 is a prime.

Together with 61140379, 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 (61140379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30570188 + 30570189.

It is an arithmetic number, because the mean of its divisors is an integer number (30570189).

Almost surely, 2^61140377 is an apocalyptic number.

It is an amenable number.

61140377 is a deficient number, since it is larger than the sum of its proper divisors (1).

61140377 is an equidigital number, since it uses as much as digits as its factorization.

61140377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 61140377 is about 7819.2312281963. The cubic root of 61140377 is about 393.9514507247.

The spelling of 61140377 in words is "sixty-one million, one hundred forty thousand, three hundred seventy-seven".