1672329397 has 4 divisors (see below), whose sum is σ = 1675031680. Its totient is φ = 1669627116.

The previous prime is 1672329391. The next prime is 1672329431. The reversal of 1672329397 is 7939232761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7939232761 = 113 ⋅70258697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1672329397 is a prime.

It is a super-2 number, since 2×1672329397² = 5593371224140767218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1672329397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672329391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350213 + ... + 1351450.

It is an arithmetic number, because the mean of its divisors is an integer number (418757920).

Almost surely, 2^1672329397 is an apocalyptic number.

It is an amenable number.

1672329397 is a deficient number, since it is larger than the sum of its proper divisors (2702283).

1672329397 is an equidigital number, since it uses as much as digits as its factorization.

1672329397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702282.

The product of its digits is 857304, while the sum is 49.

The square root of 1672329397 is about 40894.1242356405. The cubic root of 1672329397 is about 1186.9723654390.

The spelling of 1672329397 in words is "one billion, six hundred seventy-two million, three hundred twenty-nine thousand, three hundred ninety-seven".