774378149 has 4 divisors (see below), whose sum is σ = 776051136. Its totient is φ = 772705164.

The previous prime is 774378139. The next prime is 774378179. The reversal of 774378149 is 941873477.

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.

It is a cyclic number.

It is not a de Polignac number, because 774378149 - 2¹² = 774374053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 774378097 and 774378106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774378139) 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, 835799 + ... + 836724.

It is an arithmetic number, because the mean of its divisors is an integer number (194012784).

Almost surely, 2^774378149 is an apocalyptic number.

It is an amenable number.

774378149 is a deficient number, since it is larger than the sum of its proper divisors (1672987).

774378149 is a wasteful number, since it uses less digits than its factorization.

774378149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672986.

The product of its digits is 1185408, while the sum is 50.

The square root of 774378149 is about 27827.6507991602. The cubic root of 774378149 is about 918.2995325812.

The spelling of 774378149 in words is "seven hundred seventy-four million, three hundred seventy-eight thousand, one hundred forty-nine".