61248909 has 8 divisors (see below), whose sum is σ = 86469120. Its totient is φ = 38430656.

The previous prime is 61248893. The next prime is 61248917. The reversal of 61248909 is 90984216.

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 61248909 - 2⁴ = 61248893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61248959) 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, 600429 + ... + 600530.

It is an arithmetic number, because the mean of its divisors is an integer number (10808640).

Almost surely, 2^61248909 is an apocalyptic number.

It is an amenable number.

61248909 is a deficient number, since it is larger than the sum of its proper divisors (25220211).

61248909 is a wasteful number, since it uses less digits than its factorization.

61248909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200979.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 61248909 is about 7826.1682195056. The cubic root of 61248909 is about 394.1844176910.

The spelling of 61248909 in words is "sixty-one million, two hundred forty-eight thousand, nine hundred nine".