187491053 has 2 divisors, whose sum is σ = 187491054. Its totient is φ = 187491052.

The previous prime is 187491023. The next prime is 187491077. The reversal of 187491053 is 350194781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123698884 + 63792169 = 11122^2 + 7987^2 .

It is a cyclic number.

It is not a de Polignac number, because 187491053 - 2¹⁰ = 187490029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 187490998 and 187491016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187491023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93745526 + 93745527.

It is an arithmetic number, because the mean of its divisors is an integer number (93745527).

Almost surely, 2^187491053 is an apocalyptic number.

It is an amenable number.

187491053 is a deficient number, since it is larger than the sum of its proper divisors (1).

187491053 is an equidigital number, since it uses as much as digits as its factorization.

187491053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 187491053 is about 13692.7372354836. The cubic root of 187491053 is about 572.3480173467.

The spelling of 187491053 in words is "one hundred eighty-seven million, four hundred ninety-one thousand, fifty-three".