72749029 has 4 divisors (see below), whose sum is σ = 73321984. Its totient is φ = 72176076.

The previous prime is 72749021. The next prime is 72749051. The reversal of 72749029 is 92094727.

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: 92094727 = 811 ⋅113557.

It is a cyclic number.

It is not a de Polignac number, because 72749029 - 2³ = 72749021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72748982 and 72749000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72749021) 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, 286287 + ... + 286540.

It is an arithmetic number, because the mean of its divisors is an integer number (18330496).

Almost surely, 2^72749029 is an apocalyptic number.

It is an amenable number.

72749029 is a deficient number, since it is larger than the sum of its proper divisors (572955).

72749029 is a wasteful number, since it uses less digits than its factorization.

72749029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572954.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 72749029 is about 8529.3041333980. The cubic root of 72749029 is about 417.4544231744.

The spelling of 72749029 in words is "seventy-two million, seven hundred forty-nine thousand, twenty-nine".