149378687 has 2 divisors, whose sum is σ = 149378688. Its totient is φ = 149378686.

The previous prime is 149378683. The next prime is 149378693. The reversal of 149378687 is 786873941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149378687 - 2² = 149378683 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149378683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74689343 + 74689344.

It is an arithmetic number, because the mean of its divisors is an integer number (74689344).

Almost surely, 2^149378687 is an apocalyptic number.

149378687 is a deficient number, since it is larger than the sum of its proper divisors (1).

149378687 is an equidigital number, since it uses as much as digits as its factorization.

149378687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 53.

The square root of 149378687 is about 12222.0573963633. The cubic root of 149378687 is about 530.5946653885.

The spelling of 149378687 in words is "one hundred forty-nine million, three hundred seventy-eight thousand, six hundred eighty-seven".