61321699 has 8 divisors (see below), whose sum is σ = 62763840. Its totient is φ = 59885376.

The previous prime is 61321661. The next prime is 61321717. The reversal of 61321699 is 99612316.

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 61321699 - 2¹³ = 61313507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61321619) 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, 25597 + ... + 27889.

It is an arithmetic number, because the mean of its divisors is an integer number (7845480).

Almost surely, 2^61321699 is an apocalyptic number.

61321699 is a deficient number, since it is larger than the sum of its proper divisors (1442141).

61321699 is a wasteful number, since it uses less digits than its factorization.

61321699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909.

The product of its digits is 17496, while the sum is 37.

The square root of 61321699 is about 7830.8172625850. The cubic root of 61321699 is about 394.3405093141.

The spelling of 61321699 in words is "sixty-one million, three hundred twenty-one thousand, six hundred ninety-nine".