146691047 has 4 divisors (see below), whose sum is σ = 147169176. Its totient is φ = 146212920.

The previous prime is 146691043. The next prime is 146691053. The reversal of 146691047 is 740196641.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740196641 = 31 ⋅23877311.

It is a cyclic number.

It is not a de Polignac number, because 146691047 - 2² = 146691043 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 146691047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146691043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238604 + ... + 239217.

It is an arithmetic number, because the mean of its divisors is an integer number (36792294).

Almost surely, 2^146691047 is an apocalyptic number.

146691047 is a deficient number, since it is larger than the sum of its proper divisors (478129).

146691047 is an equidigital number, since it uses as much as digits as its factorization.

146691047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478128.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 146691047 is about 12111.6079444473. The cubic root of 146691047 is about 527.3932124376.

The spelling of 146691047 in words is "one hundred forty-six million, six hundred ninety-one thousand, forty-seven".