72775801 has 4 divisors (see below), whose sum is σ = 83172352. Its totient is φ = 62379252.

The previous prime is 72775771. The next prime is 72775831. The reversal of 72775801 is 10857727.

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: 10857727 = 1663 ⋅6529.

It is an interprime number because it is at equal distance from previous prime (72775771) and next prime (72775831).

It is a cyclic number.

It is not a de Polignac number, because 72775801 - 2²¹ = 70678649 is a prime.

It is a super-2 number, since 2×72775801² = 10592634422383202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72775831) 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, 5198265 + ... + 5198278.

It is an arithmetic number, because the mean of its divisors is an integer number (20793088).

Almost surely, 2^72775801 is an apocalyptic number.

It is an amenable number.

72775801 is a deficient number, since it is larger than the sum of its proper divisors (10396551).

72775801 is a wasteful number, since it uses less digits than its factorization.

72775801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10396550.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 72775801 is about 8530.8734019443. The cubic root of 72775801 is about 417.5056253201.

The spelling of 72775801 in words is "seventy-two million, seven hundred seventy-five thousand, eight hundred one".