67431497 has 6 divisors (see below), whose sum is σ = 78440778. Its totient is φ = 57798384.

The previous prime is 67431491. The next prime is 67431509. The reversal of 67431497 is 79413476.

It can be written as a sum of positive squares in only one way, i.e., 33918976 + 33512521 = 5824^2 + 5789^2 .

It is not a de Polignac number, because 67431497 - 2¹² = 67427401 is a prime.

It is a super-2 number, since 2×67431497² = 9094013575322018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67431491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688028 + ... + 688125.

It is an arithmetic number, because the mean of its divisors is an integer number (13073463).

Almost surely, 2^67431497 is an apocalyptic number.

It is an amenable number.

67431497 is a deficient number, since it is larger than the sum of its proper divisors (11009281).

67431497 is a wasteful number, since it uses less digits than its factorization.

67431497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376167 (or 1376160 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 67431497 is about 8211.6683444961. The cubic root of 67431497 is about 407.0248582756.

The spelling of 67431497 in words is "sixty-seven million, four hundred thirty-one thousand, four hundred ninety-seven".