60691861 has 4 divisors (see below), whose sum is σ = 60730924. Its totient is φ = 60652800.

The previous prime is 60691843. The next prime is 60691901. The reversal of 60691861 is 16819606.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39816100 + 20875761 = 6310^2 + 4569^2 .

It is a cyclic number.

It is not a de Polignac number, because 60691861 - 2⁹ = 60691349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 60691861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60691801) 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, 17100 + ... + 20341.

It is an arithmetic number, because the mean of its divisors is an integer number (15182731).

Almost surely, 2^60691861 is an apocalyptic number.

It is an amenable number.

60691861 is a deficient number, since it is larger than the sum of its proper divisors (39063).

60691861 is a wasteful number, since it uses less digits than its factorization.

60691861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39062.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 60691861 is about 7790.4981227133. The cubic root of 60691861 is about 392.9857639330.

The spelling of 60691861 in words is "sixty million, six hundred ninety-one thousand, eight hundred sixty-one".