902138194 has 12 divisors (see below), whose sum is σ = 1385414766. Its totient is φ = 440577312.

The previous prime is 902138189. The next prime is 902138197. The reversal of 902138194 is 491831209.

It can be written as a sum of positive squares in only one way, i.e., 745563025 + 156575169 = 27305^2 + 12513^2 .

It is not an unprimeable number, because it can be changed into a prime (902138197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118279 + ... + 125674.

Almost surely, 2^902138194 is an apocalyptic number.

902138194 is a deficient number, since it is larger than the sum of its proper divisors (483276572).

902138194 is a wasteful number, since it uses less digits than its factorization.

902138194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244041 (or 243998 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 902138194 is about 30035.6154256909. The cubic root of 902138194 is about 966.2533738328.

The spelling of 902138194 in words is "nine hundred two million, one hundred thirty-eight thousand, one hundred ninety-four".