149978405 has 8 divisors (see below), whose sum is σ = 180343584. Its totient is φ = 119736400.

The previous prime is 149978399. The next prime is 149978407. The reversal of 149978405 is 504879941.

149978405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 149978405 - 2¹⁰ = 149977381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149978405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149978407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28091 + ... + 33000.

It is an arithmetic number, because the mean of its divisors is an integer number (22542948).

Almost surely, 2^149978405 is an apocalyptic number.

It is an amenable number.

149978405 is a deficient number, since it is larger than the sum of its proper divisors (30365179).

149978405 is an equidigital number, since it uses as much as digits as its factorization.

149978405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61587.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 149978405 is about 12246.5670699997. The cubic root of 149978405 is about 531.3037854656.

The spelling of 149978405 in words is "one hundred forty-nine million, nine hundred seventy-eight thousand, four hundred five".