61945493 has 2 divisors, whose sum is σ = 61945494. Its totient is φ = 61945492.

The previous prime is 61945447. The next prime is 61945531. The reversal of 61945493 is 39454916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48121969 + 13823524 = 6937^2 + 3718^2 .

It is a cyclic number.

It is not a de Polignac number, because 61945493 - 2⁸ = 61945237 is a prime.

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 61945493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61945423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30972746 + 30972747.

It is an arithmetic number, because the mean of its divisors is an integer number (30972747).

Almost surely, 2^61945493 is an apocalyptic number.

It is an amenable number.

61945493 is a deficient number, since it is larger than the sum of its proper divisors (1).

61945493 is an equidigital number, since it uses as much as digits as its factorization.

61945493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 61945493 is about 7870.5459149922. The cubic root of 61945493 is about 395.6731415869.

The spelling of 61945493 in words is "sixty-one million, nine hundred forty-five thousand, four hundred ninety-three".