1187055407 has 2 divisors, whose sum is σ = 1187055408. Its totient is φ = 1187055406.

The previous prime is 1187055371. The next prime is 1187055433. The reversal of 1187055407 is 7045507811.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1187055407 - 2¹⁴ = 1187039023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187055307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593527703 + 593527704.

It is an arithmetic number, because the mean of its divisors is an integer number (593527704).

Almost surely, 2^1187055407 is an apocalyptic number.

1187055407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187055407 is an equidigital number, since it uses as much as digits as its factorization.

1187055407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39200, while the sum is 38.

The square root of 1187055407 is about 34453.6704430747. The cubic root of 1187055407 is about 1058.8237239525.

The spelling of 1187055407 in words is "one billion, one hundred eighty-seven million, fifty-five thousand, four hundred seven".