1228953997 has 2 divisors, whose sum is σ = 1228953998. Its totient is φ = 1228953996.

The previous prime is 1228953907. The next prime is 1228954003. The reversal of 1228953997 is 7993598221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1195707241 + 33246756 = 34579^2 + 5766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228953997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228953907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614476998 + 614476999.

It is an arithmetic number, because the mean of its divisors is an integer number (614476999).

Almost surely, 2^1228953997 is an apocalyptic number.

It is an amenable number.

1228953997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228953997 is an equidigital number, since it uses as much as digits as its factorization.

1228953997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 1228953997 is about 35056.4401643978. The cubic root of 1228953997 is about 1071.1374624751.

The spelling of 1228953997 in words is "one billion, two hundred twenty-eight million, nine hundred fifty-three thousand, nine hundred ninety-seven".