61270391 has 16 divisors (see below), whose sum is σ = 75790848. Its totient is φ = 48232800.

The previous prime is 61270387. The next prime is 61270423. The reversal of 61270391 is 19307216.

It is not a de Polignac number, because 61270391 - 2² = 61270387 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61270331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17606 + ... + 20796.

It is an arithmetic number, because the mean of its divisors is an integer number (4736928).

Almost surely, 2^61270391 is an apocalyptic number.

61270391 is a deficient number, since it is larger than the sum of its proper divisors (14520457).

61270391 is a wasteful number, since it uses less digits than its factorization.

61270391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 61270391 is about 7827.5405460464. The cubic root of 61270391 is about 394.2304967696.

The spelling of 61270391 in words is "sixty-one million, two hundred seventy thousand, three hundred ninety-one".