61419949 has 2 divisors, whose sum is σ = 61419950. Its totient is φ = 61419948.

The previous prime is 61419947. The next prime is 61419973. The reversal of 61419949 is 94991416.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55204900 + 6215049 = 7430^2 + 2493^2 .

It is a cyclic number.

It is not a de Polignac number, because 61419949 - 2¹ = 61419947 is a prime.

Together with 61419947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61419947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30709974 + 30709975.

It is an arithmetic number, because the mean of its divisors is an integer number (30709975).

Almost surely, 2^61419949 is an apocalyptic number.

It is an amenable number.

61419949 is a deficient number, since it is larger than the sum of its proper divisors (1).

61419949 is an equidigital number, since it uses as much as digits as its factorization.

61419949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 61419949 is about 7837.0880433998. The cubic root of 61419949 is about 394.5510018593.

The spelling of 61419949 in words is "sixty-one million, four hundred nineteen thousand, nine hundred forty-nine".