149121794 has 4 divisors (see below), whose sum is σ = 223682694. Its totient is φ = 74560896.

The previous prime is 149121793. The next prime is 149121821. The reversal of 149121794 is 497121941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497121941 = 2357 ⋅210913.

It can be written as a sum of positive squares in only one way, i.e., 87703225 + 61418569 = 9365^2 + 7837^2 .

It is not an unprimeable number, because it can be changed into a prime (149121793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37280447 + ... + 37280450.

Almost surely, 2^149121794 is an apocalyptic number.

149121794 is a deficient number, since it is larger than the sum of its proper divisors (74560900).

149121794 is an equidigital number, since it uses as much as digits as its factorization.

149121794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74560899.

The product of its digits is 18144, while the sum is 38.

The square root of 149121794 is about 12211.5434732879. The cubic root of 149121794 is about 530.2903286499.

The spelling of 149121794 in words is "one hundred forty-nine million, one hundred twenty-one thousand, seven hundred ninety-four".