61894757 has 4 divisors (see below), whose sum is σ = 61957836. Its totient is φ = 61831680.

The previous prime is 61894741. The next prime is 61894823. The reversal of 61894757 is 75749816.

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 24611521 + 37283236 = 4961^2 + 6106^2 .

It is a cyclic number.

It is not a de Polignac number, because 61894757 - 2⁴ = 61894741 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 (61890757) 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, 30044 + ... + 32037.

It is an arithmetic number, because the mean of its divisors is an integer number (15489459).

Almost surely, 2^61894757 is an apocalyptic number.

It is an amenable number.

61894757 is a deficient number, since it is larger than the sum of its proper divisors (63079).

61894757 is an equidigital number, since it uses as much as digits as its factorization.

61894757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63078.

The product of its digits is 423360, while the sum is 47.

The square root of 61894757 is about 7867.3220984017. The cubic root of 61894757 is about 395.5650876900.

The spelling of 61894757 in words is "sixty-one million, eight hundred ninety-four thousand, seven hundred fifty-seven".