1391657106 has 32 divisors (see below), whose sum is σ = 3201206400. Its totient is φ = 395081856.

The previous prime is 1391657063. The next prime is 1391657129. The reversal of 1391657106 is 6017561931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98931 + ... + 112118.

It is an arithmetic number, because the mean of its divisors is an integer number (100037700).

Almost surely, 2^1391657106 is an apocalyptic number.

1391657106 is an abundant number, since it is smaller than the sum of its proper divisors (1809549294).

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

1391657106 is a wasteful number, since it uses less digits than its factorization.

1391657106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211218.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 1391657106 is about 37304.9206673865. The cubic root of 1391657106 is about 1116.4623458450.

The spelling of 1391657106 in words is "one billion, three hundred ninety-one million, six hundred fifty-seven thousand, one hundred six".