61697 has 4 divisors (see below), whose sum is σ = 62400. Its totient is φ = 60996.

The previous prime is 61687. The next prime is 61703. The reversal of 61697 is 79616.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61697 - 2⁴ = 61681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197 + ... + 402.

It is an arithmetic number, because the mean of its divisors is an integer number (15600).

It is a Proth number, since it is equal to 241 ⋅ 2⁸ + 1 and 241 < 2⁸.

2⁶¹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

61697 is a deficient number, since it is larger than the sum of its proper divisors (703).

61697 is a wasteful number, since it uses less digits than its factorization.

61697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702.

The product of its digits is 2268, while the sum is 29.

The square root of 61697 is about 248.3888081215. The cubic root of 61697 is about 39.5143354472.

The spelling of 61697 in words is "sixty-one thousand, six hundred ninety-seven".