72773801 has 4 divisors (see below), whose sum is σ = 72914004. Its totient is φ = 72633600.

The previous prime is 72773791. The next prime is 72773807. The reversal of 72773801 is 10837727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13868176 + 58905625 = 3724^2 + 7675^2 .

It is a cyclic number.

It is not a de Polignac number, because 72773801 - 2⁶ = 72773737 is a prime.

It is a super-2 number, since 2×72773801² = 10592052223975202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72773807) 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, 69320 + ... + 70361.

It is an arithmetic number, because the mean of its divisors is an integer number (18228501).

Almost surely, 2^72773801 is an apocalyptic number.

It is an amenable number.

72773801 is a deficient number, since it is larger than the sum of its proper divisors (140203).

72773801 is a wasteful number, since it uses less digits than its factorization.

72773801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140202.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 72773801 is about 8530.7561798471. The cubic root of 72773801 is about 417.5018007022.

The spelling of 72773801 in words is "seventy-two million, seven hundred seventy-three thousand, eight hundred one".