61200391 has 8 divisors (see below), whose sum is σ = 74057760. Its totient is φ = 49371648.

The previous prime is 61200389. The next prime is 61200407. The reversal of 61200391 is 19300216.

61200391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61200391 - 2¹ = 61200389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61200361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257026 + ... + 257263.

It is an arithmetic number, because the mean of its divisors is an integer number (9257220).

Almost surely, 2^61200391 is an apocalyptic number.

61200391 is a deficient number, since it is larger than the sum of its proper divisors (12857369).

61200391 is a wasteful number, since it uses less digits than its factorization.

61200391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514313.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 61200391 is about 7823.0678764792. The cubic root of 61200391 is about 394.0803064938.

The spelling of 61200391 in words is "sixty-one million, two hundred thousand, three hundred ninety-one".