5401439987 has 2 divisors, whose sum is σ = 5401439988. Its totient is φ = 5401439986.

The previous prime is 5401439977. The next prime is 5401440043. The reversal of 5401439987 is 7899341045.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5401439987 - 2⁸ = 5401439731 is a prime.

It is not a weakly prime, because it can be changed into another prime (5401439977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2700719993 + 2700719994.

It is an arithmetic number, because the mean of its divisors is an integer number (2700719994).

Almost surely, 2^5401439987 is an apocalyptic number.

5401439987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5401439987 is an equidigital number, since it uses as much as digits as its factorization.

5401439987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 5401439987 is about 73494.4895009143. The cubic root of 5401439987 is about 1754.5665752729.

The spelling of 5401439987 in words is "five billion, four hundred one million, four hundred thirty-nine thousand, nine hundred eighty-seven".