672235381 has 2 divisors, whose sum is σ = 672235382. Its totient is φ = 672235380.

The previous prime is 672235367. The next prime is 672235391. The reversal of 672235381 is 183532276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397803025 + 274432356 = 19945^2 + 16566^2 .

It is a cyclic number.

It is not a de Polignac number, because 672235381 - 2¹⁵ = 672202613 is a prime.

It is a super-2 number, since 2×672235381² = 903800814936430322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 672235381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672235331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336117690 + 336117691.

It is an arithmetic number, because the mean of its divisors is an integer number (336117691).

Almost surely, 2^672235381 is an apocalyptic number.

It is an amenable number.

672235381 is a deficient number, since it is larger than the sum of its proper divisors (1).

672235381 is an equidigital number, since it uses as much as digits as its factorization.

672235381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 672235381 is about 25927.5024057467. The cubic root of 672235381 is about 876.0060834596.

The spelling of 672235381 in words is "six hundred seventy-two million, two hundred thirty-five thousand, three hundred eighty-one".