902045191 has 4 divisors (see below), whose sum is σ = 902105272. Its totient is φ = 901985112.

The previous prime is 902045189. The next prime is 902045231. The reversal of 902045191 is 191540209.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 902045191 - 2¹ = 902045189 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 (902045101) 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, 14125 + ... + 44761.

It is an arithmetic number, because the mean of its divisors is an integer number (225526318).

Almost surely, 2^902045191 is an apocalyptic number.

902045191 is a deficient number, since it is larger than the sum of its proper divisors (60081).

902045191 is a wasteful number, since it uses less digits than its factorization.

902045191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60080.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 902045191 is about 30034.0671737945. The cubic root of 902045191 is about 966.2201684432.

The spelling of 902045191 in words is "nine hundred two million, forty-five thousand, one hundred ninety-one".