149394947 has 4 divisors (see below), whose sum is σ = 160886880. Its totient is φ = 137903016.

The previous prime is 149394941. The next prime is 149394961. The reversal of 149394947 is 749493941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149394947 - 2¹² = 149390851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149394895 and 149394904.

It is not an unprimeable number, because it can be changed into a prime (149394941) 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 in 3 ways as a sum of consecutive naturals, for example, 5745947 + ... + 5745972.

It is an arithmetic number, because the mean of its divisors is an integer number (40221720).

Almost surely, 2^149394947 is an apocalyptic number.

149394947 is a deficient number, since it is larger than the sum of its proper divisors (11491933).

149394947 is a wasteful number, since it uses less digits than its factorization.

149394947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11491932.

The product of its digits is 979776, while the sum is 50.

The square root of 149394947 is about 12222.7225690515. The cubic root of 149394947 is about 530.6139165870.

The spelling of 149394947 in words is "one hundred forty-nine million, three hundred ninety-four thousand, nine hundred forty-seven".