61129493 has 2 divisors, whose sum is σ = 61129494. Its totient is φ = 61129492.

The previous prime is 61129457. The next prime is 61129529. The reversal of 61129493 is 39492116.

It is a balanced prime because it is at equal distance from previous prime (61129457) and next prime (61129529).

It can be written as a sum of positive squares in only one way, i.e., 39664804 + 21464689 = 6298^2 + 4633^2 .

It is a cyclic number.

It is not a de Polignac number, because 61129493 - 2¹⁰ = 61128469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61129693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30564746 + 30564747.

It is an arithmetic number, because the mean of its divisors is an integer number (30564747).

Almost surely, 2^61129493 is an apocalyptic number.

It is an amenable number.

61129493 is a deficient number, since it is larger than the sum of its proper divisors (1).

61129493 is an equidigital number, since it uses as much as digits as its factorization.

61129493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 61129493 is about 7818.5352208710. The cubic root of 61129493 is about 393.9280727092.

The spelling of 61129493 in words is "sixty-one million, one hundred twenty-nine thousand, four hundred ninety-three".