1947151902 has 16 divisors (see below), whose sum is σ = 3895220880. Its totient is φ = 648897792.

The previous prime is 1947151889. The next prime is 1947151909. The reversal of 1947151902 is 2091517491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947151909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8877 + ... + 63032.

It is an arithmetic number, because the mean of its divisors is an integer number (243451305).

Almost surely, 2^1947151902 is an apocalyptic number.

1947151902 is an abundant number, since it is smaller than the sum of its proper divisors (1948068978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1947151902 is a wasteful number, since it uses less digits than its factorization.

1947151902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76427.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 1947151902 is about 44126.5441882774. The cubic root of 1947151902 is about 1248.7244378891.

The spelling of 1947151902 in words is "one billion, nine hundred forty-seven million, one hundred fifty-one thousand, nine hundred two".