1187016427 has 4 divisors (see below), whose sum is σ = 1203277000. Its totient is φ = 1170755856.

The previous prime is 1187016409. The next prime is 1187016463. The reversal of 1187016427 is 7246107811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7246107811 = 223 ⋅32493757.

It is a cyclic number.

It is not a de Polignac number, because 1187016427 - 2²³ = 1178627819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187016497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8130177 + ... + 8130322.

It is an arithmetic number, because the mean of its divisors is an integer number (300819250).

Almost surely, 2^1187016427 is an apocalyptic number.

1187016427 is a deficient number, since it is larger than the sum of its proper divisors (16260573).

1187016427 is an equidigital number, since it uses as much as digits as its factorization.

1187016427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16260572.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 1187016427 is about 34453.1047512412. The cubic root of 1187016427 is about 1058.8121340973.

The spelling of 1187016427 in words is "one billion, one hundred eighty-seven million, sixteen thousand, four hundred twenty-seven".