1397638101 has 16 divisors (see below), whose sum is σ = 1888034688. Its totient is φ = 919560000.

The previous prime is 1397638091. The next prime is 1397638117. The reversal of 1397638101 is 1018367931.

It is not a de Polignac number, because 1397638101 - 2⁹ = 1397637589 is a prime.

It is a super-2 number, since 2×1397638101² = 3906784522733772402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1397638101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397631101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88776 + ... + 103326.

It is an arithmetic number, because the mean of its divisors is an integer number (118002168).

Almost surely, 2^1397638101 is an apocalyptic number.

It is an amenable number.

1397638101 is a deficient number, since it is larger than the sum of its proper divisors (490396587).

1397638101 is a wasteful number, since it uses less digits than its factorization.

1397638101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14972.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1397638101 is about 37384.9983415808. The cubic root of 1397638101 is about 1118.0594855185.

The spelling of 1397638101 in words is "one billion, three hundred ninety-seven million, six hundred thirty-eight thousand, one hundred one".