149947905 has 32 divisors (see below), whose sum is σ = 267408000. Its totient is φ = 71304192.

The previous prime is 149947901. The next prime is 149947957. The reversal of 149947905 is 509749941.

It is not a de Polignac number, because 149947905 - 2² = 149947901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149947901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10630 + ... + 20319.

It is an arithmetic number, because the mean of its divisors is an integer number (8356500).

Almost surely, 2^149947905 is an apocalyptic number.

149947905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

149947905 is a deficient number, since it is larger than the sum of its proper divisors (117460095).

149947905 is a wasteful number, since it uses less digits than its factorization.

149947905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30993.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 149947905 is about 12245.3217597579. The cubic root of 149947905 is about 531.2677672489.

The spelling of 149947905 in words is "one hundred forty-nine million, nine hundred forty-seven thousand, nine hundred five".