155487407 has 2 divisors, whose sum is σ = 155487408. Its totient is φ = 155487406.

The previous prime is 155487391. The next prime is 155487433. The reversal of 155487407 is 704784551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155487407 - 2⁴ = 155487391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155487467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77743703 + 77743704.

It is an arithmetic number, because the mean of its divisors is an integer number (77743704).

Almost surely, 2^155487407 is an apocalyptic number.

155487407 is a deficient number, since it is larger than the sum of its proper divisors (1).

155487407 is an equidigital number, since it uses as much as digits as its factorization.

155487407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156800, while the sum is 41.

The square root of 155487407 is about 12469.4589698190. The cubic root of 155487407 is about 537.7309994660.

The spelling of 155487407 in words is "one hundred fifty-five million, four hundred eighty-seven thousand, four hundred seven".