187339457 has 2 divisors, whose sum is σ = 187339458. Its totient is φ = 187339456.

The previous prime is 187339441. The next prime is 187339459. The reversal of 187339457 is 754933781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172160641 + 15178816 = 13121^2 + 3896^2 .

It is a cyclic number.

It is not a de Polignac number, because 187339457 - 2⁴ = 187339441 is a prime.

Together with 187339459, 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 (187339459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93669728 + 93669729.

It is an arithmetic number, because the mean of its divisors is an integer number (93669729).

Almost surely, 2^187339457 is an apocalyptic number.

It is an amenable number.

187339457 is a deficient number, since it is larger than the sum of its proper divisors (1).

187339457 is an equidigital number, since it uses as much as digits as its factorization.

187339457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 187339457 is about 13687.2004807411. The cubic root of 187339457 is about 572.1937183122.

The spelling of 187339457 in words is "one hundred eighty-seven million, three hundred thirty-nine thousand, four hundred fifty-seven".