1667974253 has 4 divisors (see below), whose sum is σ = 1819608288. Its totient is φ = 1516340220.

The previous prime is 1667974247. The next prime is 1667974271. The reversal of 1667974253 is 3524797661.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1667974253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667974213) 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, 75817001 + ... + 75817022.

It is an arithmetic number, because the mean of its divisors is an integer number (454902072).

Almost surely, 2^1667974253 is an apocalyptic number.

It is an amenable number.

1667974253 is a deficient number, since it is larger than the sum of its proper divisors (151634035).

1667974253 is a wasteful number, since it uses less digits than its factorization.

1667974253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151634034.

The product of its digits is 1905120, while the sum is 50.

The square root of 1667974253 is about 40840.8405031042. The cubic root of 1667974253 is about 1185.9410834501.

The spelling of 1667974253 in words is "one billion, six hundred sixty-seven million, nine hundred seventy-four thousand, two hundred fifty-three".