1391145694 has 8 divisors (see below), whose sum is σ = 2091004848. Its totient is φ = 694144080.

The previous prime is 1391145661. The next prime is 1391145727. The reversal of 1391145694 is 4965411931.

It is an interprime number because it is at equal distance from previous prime (1391145661) and next prime (1391145727).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1391145694.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713167 + ... + 715114.

It is an arithmetic number, because the mean of its divisors is an integer number (261375606).

Almost surely, 2^1391145694 is an apocalyptic number.

1391145694 is a deficient number, since it is larger than the sum of its proper divisors (699859154).

1391145694 is a wasteful number, since it uses less digits than its factorization.

1391145694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428770.

The product of its digits is 116640, while the sum is 43.

The square root of 1391145694 is about 37298.0655530552. The cubic root of 1391145694 is about 1116.3255683314.

The spelling of 1391145694 in words is "one billion, three hundred ninety-one million, one hundred forty-five thousand, six hundred ninety-four".