146139631 has 8 divisors (see below), whose sum is σ = 166356864. Its totient is φ = 127077720.

The previous prime is 146139577. The next prime is 146139689. The reversal of 146139631 is 136931641.

It is a happy number.

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

It is not a de Polignac number, because 146139631 - 2¹⁹ = 145615343 is a prime.

It is a super-2 number, since 2×146139631² = 42713583497632322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146139031) 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, 288561 + ... + 289066.

It is an arithmetic number, because the mean of its divisors is an integer number (20794608).

Almost surely, 2^146139631 is an apocalyptic number.

146139631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

146139631 is a deficient number, since it is larger than the sum of its proper divisors (20217233).

146139631 is a wasteful number, since it uses less digits than its factorization.

146139631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577661.

The product of its digits is 11664, while the sum is 34.

The square root of 146139631 is about 12088.8225646669. The cubic root of 146139631 is about 526.7315537654.

The spelling of 146139631 in words is "one hundred forty-six million, one hundred thirty-nine thousand, six hundred thirty-one".