72074477 has 4 divisors (see below), whose sum is σ = 72128796. Its totient is φ = 72020160.

The previous prime is 72074449. The next prime is 72074507. The reversal of 72074477 is 77447027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77447027 = 7 ⋅11063861.

It can be written as a sum of positive squares in 2 ways, for example, as 4932841 + 67141636 = 2221^2 + 8194^2 .

It is a cyclic number.

It is not a de Polignac number, because 72074477 - 2¹⁴ = 72058093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72074477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72074447) 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, 25118 + ... + 27839.

It is an arithmetic number, because the mean of its divisors is an integer number (18032199).

Almost surely, 2^72074477 is an apocalyptic number.

It is an amenable number.

72074477 is a deficient number, since it is larger than the sum of its proper divisors (54319).

72074477 is a wasteful number, since it uses less digits than its factorization.

72074477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54318.

The product of its (nonzero) digits is 76832, while the sum is 38.

The square root of 72074477 is about 8489.6688392422. The cubic root of 72074477 is about 416.1601581452.

The spelling of 72074477 in words is "seventy-two million, seventy-four thousand, four hundred seventy-seven".