49961381 has 2 divisors, whose sum is σ = 49961382. Its totient is φ = 49961380.

The previous prime is 49961371. The next prime is 49961383. The reversal of 49961381 is 18316994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 188356 = 7055^2 + 434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49961381 is a prime.

It is a super-2 number, since 2×49961381² = 4992279182854322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 49961383, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49961383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24980690 + 24980691.

It is an arithmetic number, because the mean of its divisors is an integer number (24980691).

Almost surely, 2^49961381 is an apocalyptic number.

It is an amenable number.

49961381 is a deficient number, since it is larger than the sum of its proper divisors (1).

49961381 is an equidigital number, since it uses as much as digits as its factorization.

49961381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 49961381 is about 7068.3365086843. The cubic root of 49961381 is about 368.3082763587.

The spelling of 49961381 in words is "forty-nine million, nine hundred sixty-one thousand, three hundred eighty-one".