72774019 has 4 divisors (see below), whose sum is σ = 75121600. Its totient is φ = 70426440.

The previous prime is 72773983. The next prime is 72774041. The reversal of 72774019 is 91047727.

72774019 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91047727 = 43 ⋅2117389.

It is a cyclic number.

It is not a de Polignac number, because 72774019 - 2⁷ = 72773891 is a prime.

It is a super-2 number, since 2×72774019² = 10592115682824722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72774049) 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, 1173744 + ... + 1173805.

It is an arithmetic number, because the mean of its divisors is an integer number (18780400).

Almost surely, 2^72774019 is an apocalyptic number.

72774019 is a deficient number, since it is larger than the sum of its proper divisors (2347581).

72774019 is a wasteful number, since it uses less digits than its factorization.

72774019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347580.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 72774019 is about 8530.7689571339. The cubic root of 72774019 is about 417.5022175889.

The spelling of 72774019 in words is "seventy-two million, seven hundred seventy-four thousand, nineteen".