149409487 has 2 divisors, whose sum is σ = 149409488. Its totient is φ = 149409486.

The previous prime is 149409451. The next prime is 149409493. The reversal of 149409487 is 784904941.

It is a strong prime.

It is an emirp because it is prime and its reverse (784904941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149409487 - 2¹⁹ = 148885199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149409437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74704743 + 74704744.

It is an arithmetic number, because the mean of its divisors is an integer number (74704744).

Almost surely, 2^149409487 is an apocalyptic number.

149409487 is a deficient number, since it is larger than the sum of its proper divisors (1).

149409487 is an equidigital number, since it uses as much as digits as its factorization.

149409487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 149409487 is about 12223.3173484124. The cubic root of 149409487 is about 530.6311301903.

The spelling of 149409487 in words is "one hundred forty-nine million, four hundred nine thousand, four hundred eighty-seven".