61397 has 8 divisors (see below), whose sum is σ = 72000. Its totient is φ = 52332.

The previous prime is 61381. The next prime is 61403. The reversal of 61397 is 79316.

It is a happy number.

It is not a de Polignac number, because 61397 - 2⁴ = 61381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254 + ... + 432.

It is an arithmetic number, because the mean of its divisors is an integer number (9000).

2⁶¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

61397 is a deficient number, since it is larger than the sum of its proper divisors (10603).

61397 is an equidigital number, since it uses as much as digits as its factorization.

61397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 186 counting only the distinct ones).

The product of its digits is 1134, while the sum is 26.

The square root of 61397 is about 247.7841802860. The cubic root of 61397 is about 39.4501855618.

The spelling of 61397 in words is "sixty-one thousand, three hundred ninety-seven".