1901947253 has 4 divisors (see below), whose sum is σ = 2002049760. Its totient is φ = 1801844748.

The previous prime is 1901947231. The next prime is 1901947259. The reversal of 1901947253 is 3527491091.

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 not a de Polignac number, because 1901947253 - 2¹⁶ = 1901881717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1901947253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901947259) 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, 50051225 + ... + 50051262.

It is an arithmetic number, because the mean of its divisors is an integer number (500512440).

Almost surely, 2^1901947253 is an apocalyptic number.

It is an amenable number.

1901947253 is a deficient number, since it is larger than the sum of its proper divisors (100102507).

1901947253 is a wasteful number, since it uses less digits than its factorization.

1901947253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100102506.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 1901947253 is about 43611.3202391306. The cubic root of 1901947253 is about 1238.9853069557.

The spelling of 1901947253 in words is "one billion, nine hundred one million, nine hundred forty-seven thousand, two hundred fifty-three".