391276061 has 8 divisors (see below), whose sum is σ = 427550304. Its totient is φ = 355119120.

The previous prime is 391276057. The next prime is 391276087. The reversal of 391276061 is 160672193.

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 391276061 - 2² = 391276057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391276001) 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, 22271 + ... + 35756.

It is an arithmetic number, because the mean of its divisors is an integer number (53443788).

Almost surely, 2^391276061 is an apocalyptic number.

It is an amenable number.

391276061 is a deficient number, since it is larger than the sum of its proper divisors (36274243).

391276061 is a wasteful number, since it uses less digits than its factorization.

391276061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58651.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 391276061 is about 19780.6992040221. The cubic root of 391276061 is about 731.4103347646.

The spelling of 391276061 in words is "three hundred ninety-one million, two hundred seventy-six thousand, sixty-one".