145214893 has 4 divisors (see below), whose sum is σ = 151528608. Its totient is φ = 138901180.

The previous prime is 145214869. The next prime is 145214897. The reversal of 145214893 is 398412541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 398412541 = 619 ⋅643639.

It is a cyclic number.

It is not a de Polignac number, because 145214893 - 2¹⁷ = 145083821 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 (145214897) 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, 3156823 + ... + 3156868.

It is an arithmetic number, because the mean of its divisors is an integer number (37882152).

Almost surely, 2^145214893 is an apocalyptic number.

It is an amenable number.

145214893 is a deficient number, since it is larger than the sum of its proper divisors (6313715).

145214893 is an equidigital number, since it uses as much as digits as its factorization.

145214893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313714.

The product of its digits is 34560, while the sum is 37.

The square root of 145214893 is about 12050.5142213932. The cubic root of 145214893 is about 525.6181900088.

The spelling of 145214893 in words is "one hundred forty-five million, two hundred fourteen thousand, eight hundred ninety-three".