145991629 has 6 divisors (see below), whose sum is σ = 169827054. Its totient is φ = 125135640.

The previous prime is 145991623. The next prime is 145991641. The reversal of 145991629 is 926199541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74132100 + 71859529 = 8610^2 + 8477^2 .

It is not a de Polignac number, because 145991629 - 2³ = 145991621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145991621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1489662 + ... + 1489759.

It is an arithmetic number, because the mean of its divisors is an integer number (28304509).

Almost surely, 2^145991629 is an apocalyptic number.

It is an amenable number.

145991629 is a deficient number, since it is larger than the sum of its proper divisors (23835425).

145991629 is an equidigital number, since it uses as much as digits as its factorization.

145991629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979435 (or 2979428 counting only the distinct ones).

The product of its digits is 174960, while the sum is 46.

The square root of 145991629 is about 12082.6995741846. The cubic root of 145991629 is about 526.5536790059.

The spelling of 145991629 in words is "one hundred forty-five million, nine hundred ninety-one thousand, six hundred twenty-nine".