391151 has 2 divisors, whose sum is σ = 391152. Its totient is φ = 391150.

The previous prime is 391133. The next prime is 391159. The reversal of 391151 is 151193.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195575 + 195576.

It is an arithmetic number, because the mean of its divisors is an integer number (195576).

2³⁹¹¹⁵¹ is an apocalyptic number.

391151 is a deficient number, since it is larger than the sum of its proper divisors (1).

391151 is an equidigital number, since it uses as much as digits as its factorization.

391151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135, while the sum is 20.

The square root of 391151 is about 625.4206584372. The cubic root of 391151 is about 73.1332401165.

The spelling of 391151 in words is "three hundred ninety-one thousand, one hundred fifty-one".