997469531 has 2 divisors, whose sum is σ = 997469532. Its totient is φ = 997469530.

The previous prime is 997469519. The next prime is 997469537. The reversal of 997469531 is 135964799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997469531 - 2²⁶ = 930360667 is a prime.

It is a super-2 number, since 2×997469531² = 1989890930546719922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (997469537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498734765 + 498734766.

It is an arithmetic number, because the mean of its divisors is an integer number (498734766).

Almost surely, 2^997469531 is an apocalyptic number.

997469531 is a deficient number, since it is larger than the sum of its proper divisors (1).

997469531 is an equidigital number, since it uses as much as digits as its factorization.

997469531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 53.

The square root of 997469531 is about 31582.7410305059. The cubic root of 997469531 is about 999.1557978566.

The spelling of 997469531 in words is "nine hundred ninety-seven million, four hundred sixty-nine thousand, five hundred thirty-one".