1399018973 has 8 divisors (see below), whose sum is σ = 1541314656. Its totient is φ = 1259242000.

The previous prime is 1399018949. The next prime is 1399018981. The reversal of 1399018973 is 3798109931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1399018973 - 2¹⁸ = 1398756829 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 (1399018913) 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, 628511 + ... + 630732.

It is an arithmetic number, because the mean of its divisors is an integer number (192664332).

Almost surely, 2^1399018973 is an apocalyptic number.

It is an amenable number.

1399018973 is a deficient number, since it is larger than the sum of its proper divisors (142295683).

1399018973 is a wasteful number, since it uses less digits than its factorization.

1399018973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259355.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 1399018973 is about 37403.4620456449. The cubic root of 1399018973 is about 1118.4275800576.

The spelling of 1399018973 in words is "one billion, three hundred ninety-nine million, eighteen thousand, nine hundred seventy-three".