61897677 has 8 divisors (see below), whose sum is σ = 82598880. Its totient is φ = 41230800.

The previous prime is 61897639. The next prime is 61897699. The reversal of 61897677 is 77679816.

It is a happy number.

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

It is not a de Polignac number, because 61897677 - 2¹¹ = 61895629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61897777) 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, 4027 + ... + 11832.

It is an arithmetic number, because the mean of its divisors is an integer number (10324860).

Almost surely, 2^61897677 is an apocalyptic number.

It is an amenable number.

61897677 is a deficient number, since it is larger than the sum of its proper divisors (20701203).

61897677 is a wasteful number, since it uses less digits than its factorization.

61897677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17163.

The product of its digits is 889056, while the sum is 51.

The square root of 61897677 is about 7867.5076739715. The cubic root of 61897677 is about 395.5713080978.

The spelling of 61897677 in words is "sixty-one million, eight hundred ninety-seven thousand, six hundred seventy-seven".