72140773 has 2 divisors, whose sum is σ = 72140774. Its totient is φ = 72140772.

The previous prime is 72140767. The next prime is 72140801. The reversal of 72140773 is 37704127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64995844 + 7144929 = 8062^2 + 2673^2 .

It is a cyclic number.

It is not a de Polignac number, because 72140773 - 2¹⁷ = 72009701 is a prime.

It is a super-2 number, since 2×72140773² = 10408582258075058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72144773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36070386 + 36070387.

It is an arithmetic number, because the mean of its divisors is an integer number (36070387).

Almost surely, 2^72140773 is an apocalyptic number.

It is an amenable number.

72140773 is a deficient number, since it is larger than the sum of its proper divisors (1).

72140773 is an equidigital number, since it uses as much as digits as its factorization.

72140773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 72140773 is about 8493.5724521546. The cubic root of 72140773 is about 416.2877173961.

The spelling of 72140773 in words is "seventy-two million, one hundred forty thousand, seven hundred seventy-three".