61357 has 2 divisors, whose sum is σ = 61358. Its totient is φ = 61356.

The previous prime is 61343. The next prime is 61363. The reversal of 61357 is 75316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60516 + 841 = 246^2 + 29^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30678 + 30679.

It is an arithmetic number, because the mean of its divisors is an integer number (30679).

2⁶¹³⁵⁷ is an apocalyptic number.

It is an amenable number.

61357 is a deficient number, since it is larger than the sum of its proper divisors (1).

61357 is an equidigital number, since it uses as much as digits as its factorization.

61357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630, while the sum is 22.

The square root of 61357 is about 247.7034517321. The cubic root of 61357 is about 39.4416164665.

The spelling of 61357 in words is "sixty-one thousand, three hundred fifty-seven".