61357493 has 2 divisors, whose sum is σ = 61357494. Its totient is φ = 61357492.

The previous prime is 61357481. The next prime is 61357523. The reversal of 61357493 is 39475316.

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., 61105489 + 252004 = 7817^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 61357493 - 2⁸ = 61357237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61357453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30678746 + 30678747.

It is an arithmetic number, because the mean of its divisors is an integer number (30678747).

Almost surely, 2^61357493 is an apocalyptic number.

It is an amenable number.

61357493 is a deficient number, since it is larger than the sum of its proper divisors (1).

61357493 is an equidigital number, since it uses as much as digits as its factorization.

61357493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The square root of 61357493 is about 7833.1023866665. The cubic root of 61357493 is about 394.4172210325.

The spelling of 61357493 in words is "sixty-one million, three hundred fifty-seven thousand, four hundred ninety-three".