1388154901 has 4 divisors (see below), whose sum is σ = 1586462752. Its totient is φ = 1189847052.

The previous prime is 1388154869. The next prime is 1388154913. The reversal of 1388154901 is 1094518831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1388154901 - 2⁵ = 1388154869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388154401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99153915 + ... + 99153928.

It is an arithmetic number, because the mean of its divisors is an integer number (396615688).

Almost surely, 2^1388154901 is an apocalyptic number.

It is an amenable number.

1388154901 is a deficient number, since it is larger than the sum of its proper divisors (198307851).

1388154901 is an equidigital number, since it uses as much as digits as its factorization.

1388154901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198307850.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 1388154901 is about 37257.9508427396. The cubic root of 1388154901 is about 1115.5250065667.

The spelling of 1388154901 in words is "one billion, three hundred eighty-eight million, one hundred fifty-four thousand, nine hundred one".