387061091 has 2 divisors, whose sum is σ = 387061092. Its totient is φ = 387061090.

The previous prime is 387061019. The next prime is 387061093. The reversal of 387061091 is 190160783.

Together with previous prime (387061019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387061091 is a prime.

It is a super-2 number, since 2×387061091² = 299632576332220562, which contains 22 as substring.

Together with 387061093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (387061093) 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 as a sum of consecutive naturals, namely, 193530545 + 193530546.

It is an arithmetic number, because the mean of its divisors is an integer number (193530546).

Almost surely, 2^387061091 is an apocalyptic number.

387061091 is a deficient number, since it is larger than the sum of its proper divisors (1).

387061091 is an equidigital number, since it uses as much as digits as its factorization.

387061091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 387061091 is about 19673.8682266605. The cubic root of 387061091 is about 728.7745066768.

The spelling of 387061091 in words is "three hundred eighty-seven million, sixty-one thousand, ninety-one".