72894149 has 4 divisors (see below), whose sum is σ = 72920640. Its totient is φ = 72867660.

The previous prime is 72894131. The next prime is 72894167. The reversal of 72894149 is 94149827.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94149827 = 881 ⋅106867.

It is an interprime number because it is at equal distance from previous prime (72894131) and next prime (72894167).

It is a cyclic number.

It is not a de Polignac number, because 72894149 - 2⁸ = 72893893 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 (72894119) 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, 8567 + ... + 14804.

It is an arithmetic number, because the mean of its divisors is an integer number (18230160).

Almost surely, 2^72894149 is an apocalyptic number.

It is an amenable number.

72894149 is a deficient number, since it is larger than the sum of its proper divisors (26491).

72894149 is a wasteful number, since it uses less digits than its factorization.

72894149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26490.

The product of its digits is 145152, while the sum is 44.

The square root of 72894149 is about 8537.8070369387. The cubic root of 72894149 is about 417.7318186207.

The spelling of 72894149 in words is "seventy-two million, eight hundred ninety-four thousand, one hundred forty-nine".