61199321 has 4 divisors (see below), whose sum is σ = 61565952. Its totient is φ = 60832692.

The previous prime is 61199273. The next prime is 61199377. The reversal of 61199321 is 12399116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61199321 is a prime.

It is a super-2 number, since 2×61199321² = 7490713781722082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61199521) 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, 183065 + ... + 183398.

It is an arithmetic number, because the mean of its divisors is an integer number (15391488).

Almost surely, 2^61199321 is an apocalyptic number.

It is an amenable number.

61199321 is a deficient number, since it is larger than the sum of its proper divisors (366631).

61199321 is a wasteful number, since it uses less digits than its factorization.

61199321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366630.

The product of its digits is 2916, while the sum is 32.

The square root of 61199321 is about 7822.9994886872. Note that the first 3 decimals coincide. The cubic root of 61199321 is about 394.0780098397.

The spelling of 61199321 in words is "sixty-one million, one hundred ninety-nine thousand, three hundred twenty-one".