145729898 has 4 divisors (see below), whose sum is σ = 218594850. Its totient is φ = 72864948.

The previous prime is 145729877. The next prime is 145729907. The reversal of 145729898 is 898927541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96687889 + 49042009 = 9833^2 + 7003^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36432473 + ... + 36432476.

Almost surely, 2^145729898 is an apocalyptic number.

145729898 is a deficient number, since it is larger than the sum of its proper divisors (72864952).

145729898 is an equidigital number, since it uses as much as digits as its factorization.

145729898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72864951.

The product of its digits is 1451520, while the sum is 53.

The square root of 145729898 is about 12071.8638991665. The cubic root of 145729898 is about 526.2388256552.

The spelling of 145729898 in words is "one hundred forty-five million, seven hundred twenty-nine thousand, eight hundred ninety-eight".