1938152069 has 4 divisors (see below), whose sum is σ = 2215030944. Its totient is φ = 1661273196.

The previous prime is 1938152059. The next prime is 1938152101. The reversal of 1938152069 is 9602518391.

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 1938152069 - 2¹² = 1938147973 is a prime.

It is a super-2 number, since 2×1938152069² = 7512866885137961522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938152059) 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, 138439427 + ... + 138439440.

It is an arithmetic number, because the mean of its divisors is an integer number (553757736).

Almost surely, 2^1938152069 is an apocalyptic number.

It is an amenable number.

1938152069 is a deficient number, since it is larger than the sum of its proper divisors (276878875).

1938152069 is an equidigital number, since it uses as much as digits as its factorization.

1938152069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276878874.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1938152069 is about 44024.4485371481. The cubic root of 1938152069 is about 1246.7975773176.

The spelling of 1938152069 in words is "one billion, nine hundred thirty-eight million, one hundred fifty-two thousand, sixty-nine".