61909793 has 8 divisors (see below), whose sum is σ = 67658976. Its totient is φ = 56180800.

The previous prime is 61909787. The next prime is 61909807. The reversal of 61909793 is 39790916.

It is a happy number.

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 61909793 - 2¹⁴ = 61893409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61909753) 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, 1778 + ... + 11268.

It is an arithmetic number, because the mean of its divisors is an integer number (8457372).

Almost surely, 2^61909793 is an apocalyptic number.

It is an amenable number.

61909793 is a deficient number, since it is larger than the sum of its proper divisors (5749183).

61909793 is a wasteful number, since it uses less digits than its factorization.

61909793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10095.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 61909793 is about 7868.2776387212. The cubic root of 61909793 is about 395.5971164400.

The spelling of 61909793 in words is "sixty-one million, nine hundred nine thousand, seven hundred ninety-three".