145627399 has 4 divisors (see below), whose sum is σ = 148095720. Its totient is φ = 143159080.

The previous prime is 145627397. The next prime is 145627403. The reversal of 145627399 is 993726541.

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: 993726541 = 4591 ⋅216451.

It is a cyclic number.

It is not a de Polignac number, because 145627399 - 2¹ = 145627397 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 (145627393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1234072 + ... + 1234189.

It is an arithmetic number, because the mean of its divisors is an integer number (37023930).

Almost surely, 2^145627399 is an apocalyptic number.

145627399 is a deficient number, since it is larger than the sum of its proper divisors (2468321).

145627399 is an equidigital number, since it uses as much as digits as its factorization.

145627399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468320.

The product of its digits is 408240, while the sum is 46.

The square root of 145627399 is about 12067.6177847991. The cubic root of 145627399 is about 526.1154201745.

The spelling of 145627399 in words is "one hundred forty-five million, six hundred twenty-seven thousand, three hundred ninety-nine".