149406981 has 8 divisors (see below), whose sum is σ = 199289664. Its totient is φ = 99564480.

The previous prime is 149406923. The next prime is 149407001. The reversal of 149406981 is 189604941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149406981 - 2⁹ = 149406469 is a prime.

It is a super-2 number, since 2×149406981² = 44644891943068722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149406281) 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 7 ways as a sum of consecutive naturals, for example, 96 + ... + 17286.

It is an arithmetic number, because the mean of its divisors is an integer number (24911208).

Almost surely, 2^149406981 is an apocalyptic number.

It is an amenable number.

149406981 is a deficient number, since it is larger than the sum of its proper divisors (49882683).

149406981 is a wasteful number, since it uses less digits than its factorization.

149406981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20091.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 149406981 is about 12223.2148389857. The cubic root of 149406981 is about 530.6281634687.

The spelling of 149406981 in words is "one hundred forty-nine million, four hundred six thousand, nine hundred eighty-one".