61697477 has 8 divisors (see below), whose sum is σ = 64520064. Its totient is φ = 58886608.

The previous prime is 61697443. The next prime is 61697479. The reversal of 61697477 is 77479616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61697477 - 2⁸ = 61697221 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 (61697479) 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, 8903 + ... + 14235.

It is an arithmetic number, because the mean of its divisors is an integer number (8065008).

Almost surely, 2^61697477 is an apocalyptic number.

It is an amenable number.

61697477 is a deficient number, since it is larger than the sum of its proper divisors (2822587).

61697477 is a wasteful number, since it uses less digits than its factorization.

61697477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5859.

The product of its digits is 444528, while the sum is 47.

The square root of 61697477 is about 7854.7741533414. The cubic root of 61697477 is about 395.1443727980.

The spelling of 61697477 in words is "sixty-one million, six hundred ninety-seven thousand, four hundred seventy-seven".