997152001 has 2 divisors, whose sum is σ = 997152002. Its totient is φ = 997152000.

The previous prime is 997151999. The next prime is 997152007. The reversal of 997152001 is 100251799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 957964401 + 39187600 = 30951^2 + 6260^2 .

It is a cyclic number.

It is not a de Polignac number, because 997152001 - 2¹ = 997151999 is a prime.

It is a super-2 number, since 2×997152001² = 1988624226196608002, which contains 22 as substring.

Together with 997151999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (997152007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498576000 + 498576001.

It is an arithmetic number, because the mean of its divisors is an integer number (498576001).

Almost surely, 2^997152001 is an apocalyptic number.

It is an amenable number.

997152001 is a deficient number, since it is larger than the sum of its proper divisors (1).

997152001 is an equidigital number, since it uses as much as digits as its factorization.

997152001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 997152001 is about 31577.7136759456. The cubic root of 997152001 is about 999.0497643382.

The spelling of 997152001 in words is "nine hundred ninety-seven million, one hundred fifty-two thousand, one".