972222737 has 2 divisors, whose sum is σ = 972222738. Its totient is φ = 972222736.

The previous prime is 972222677. The next prime is 972222749. The reversal of 972222737 is 737222279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 610880656 + 361342081 = 24716^2 + 19009^2 .

It is an emirp because it is prime and its reverse (737222279) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972222737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 972222694 and 972222703.

It is not a weakly prime, because it can be changed into another prime (972222787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486111368 + 486111369.

It is an arithmetic number, because the mean of its divisors is an integer number (486111369).

Almost surely, 2^972222737 is an apocalyptic number.

It is an amenable number.

972222737 is a deficient number, since it is larger than the sum of its proper divisors (1).

972222737 is an equidigital number, since it uses as much as digits as its factorization.

972222737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 41.

The square root of 972222737 is about 31180.4864779240. The cubic root of 972222737 is about 990.6538336395.

The spelling of 972222737 in words is "nine hundred seventy-two million, two hundred twenty-two thousand, seven hundred thirty-seven".