119987431 has 2 divisors, whose sum is σ = 119987432. Its totient is φ = 119987430.

The previous prime is 119987369. The next prime is 119987449. The reversal of 119987431 is 134789911.

It is a strong prime.

It is an emirp because it is prime and its reverse (134789911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 119987431 - 2¹⁵ = 119954663 is a prime.

It is a super-2 number, since 2×119987431² = 28793967195959522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (119987531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59993715 + 59993716.

It is an arithmetic number, because the mean of its divisors is an integer number (59993716).

Almost surely, 2^119987431 is an apocalyptic number.

119987431 is a deficient number, since it is larger than the sum of its proper divisors (1).

119987431 is an equidigital number, since it uses as much as digits as its factorization.

119987431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 43.

The square root of 119987431 is about 10953.8774413447. The cubic root of 119987431 is about 493.2251932539.

The spelling of 119987431 in words is "one hundred nineteen million, nine hundred eighty-seven thousand, four hundred thirty-one".