72708401 has 4 divisors (see below), whose sum is σ = 73900404. Its totient is φ = 71516400.

The previous prime is 72708397. The next prime is 72708403. The reversal of 72708401 is 10480727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10480727 = 487 ⋅21521.

It can be written as a sum of positive squares in 2 ways, for example, as 8708401 + 64000000 = 2951^2 + 8000^2 .

It is not a de Polignac number, because 72708401 - 2² = 72708397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72708403) 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, 595910 + ... + 596031.

It is an arithmetic number, because the mean of its divisors is an integer number (18475101).

Almost surely, 2^72708401 is an apocalyptic number.

It is an amenable number.

72708401 is a deficient number, since it is larger than the sum of its proper divisors (1192003).

72708401 is a wasteful number, since it uses less digits than its factorization.

72708401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192002.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 72708401 is about 8526.9221293501. The cubic root of 72708401 is about 417.3766970669.

The spelling of 72708401 in words is "seventy-two million, seven hundred eight thousand, four hundred one".