61248791 has 4 divisors (see below), whose sum is σ = 61276032. Its totient is φ = 61221552.

The previous prime is 61248721. The next prime is 61248797. The reversal of 61248791 is 19784216.

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

It is a cyclic number.

It is not a de Polignac number, because 61248791 - 2¹⁸ = 60986647 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 (61248797) 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, 9911 + ... + 14856.

It is an arithmetic number, because the mean of its divisors is an integer number (15319008).

Almost surely, 2^61248791 is an apocalyptic number.

61248791 is a deficient number, since it is larger than the sum of its proper divisors (27241).

61248791 is a wasteful number, since it uses less digits than its factorization.

61248791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27240.

The product of its digits is 24192, while the sum is 38.

The square root of 61248791 is about 7826.1606806914. The cubic root of 61248791 is about 394.1841645502.

The spelling of 61248791 in words is "sixty-one million, two hundred forty-eight thousand, seven hundred ninety-one".