997152019 has 2 divisors, whose sum is σ = 997152020. Its totient is φ = 997152018.

The previous prime is 997152007. The next prime is 997152043. The reversal of 997152019 is 910251799.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997152019 is a prime.

It is a super-2 number, since 2×997152019² = 1988624297991552722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (997152049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498576009 + 498576010.

It is an arithmetic number, because the mean of its divisors is an integer number (498576010).

Almost surely, 2^997152019 is an apocalyptic number.

997152019 is a deficient number, since it is larger than the sum of its proper divisors (1).

997152019 is an equidigital number, since it uses as much as digits as its factorization.

997152019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 43.

The square root of 997152019 is about 31577.7139609567. The cubic root of 997152019 is about 999.0497703496.

The spelling of 997152019 in words is "nine hundred ninety-seven million, one hundred fifty-two thousand, nineteen".