672428893 has 2 divisors, whose sum is σ = 672428894. Its totient is φ = 672428892.

The previous prime is 672428873. The next prime is 672428903. The reversal of 672428893 is 398824276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608460889 + 63968004 = 24667^2 + 7998^2 .

It is a cyclic number.

It is not a de Polignac number, because 672428893 - 2⁹ = 672428381 is a prime.

It is a super-2 number, since 2×672428893² = 904321232282410898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672428833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336214446 + 336214447.

It is an arithmetic number, because the mean of its divisors is an integer number (336214447).

Almost surely, 2^672428893 is an apocalyptic number.

It is an amenable number.

672428893 is a deficient number, since it is larger than the sum of its proper divisors (1).

672428893 is an equidigital number, since it uses as much as digits as its factorization.

672428893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 672428893 is about 25931.2339274474. The cubic root of 672428893 is about 876.0901321082.

The spelling of 672428893 in words is "six hundred seventy-two million, four hundred twenty-eight thousand, eight hundred ninety-three".