187320473 has 2 divisors, whose sum is σ = 187320474. Its totient is φ = 187320472.

The previous prime is 187320461. The next prime is 187320499. The reversal of 187320473 is 374023781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179774464 + 7546009 = 13408^2 + 2747^2 .

It is an emirp because it is prime and its reverse (374023781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187320473 - 2²² = 183126169 is a prime.

It is not a weakly prime, because it can be changed into another prime (187328473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93660236 + 93660237.

It is an arithmetic number, because the mean of its divisors is an integer number (93660237).

Almost surely, 2^187320473 is an apocalyptic number.

It is an amenable number.

187320473 is a deficient number, since it is larger than the sum of its proper divisors (1).

187320473 is an equidigital number, since it uses as much as digits as its factorization.

187320473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 187320473 is about 13686.5069685439. The cubic root of 187320473 is about 572.1743899538.

The spelling of 187320473 in words is "one hundred eighty-seven million, three hundred twenty thousand, four hundred seventy-three".