72774149 has 4 divisors (see below), whose sum is σ = 83170464. Its totient is φ = 62377836.

The previous prime is 72774131. The next prime is 72774167. The reversal of 72774149 is 94147727.

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 an interprime number because it is at equal distance from previous prime (72774131) and next prime (72774167).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72774149 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 (72774179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5198147 + ... + 5198160.

It is an arithmetic number, because the mean of its divisors is an integer number (20792616).

Almost surely, 2^72774149 is an apocalyptic number.

It is an amenable number.

72774149 is a deficient number, since it is larger than the sum of its proper divisors (10396315).

72774149 is a wasteful number, since it uses less digits than its factorization.

72774149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10396314.

The product of its digits is 98784, while the sum is 41.

The square root of 72774149 is about 8530.7765766078. The cubic root of 72774149 is about 417.5024661907.

The spelling of 72774149 in words is "seventy-two million, seven hundred seventy-four thousand, one hundred forty-nine".