1538993941 has 8 divisors (see below), whose sum is σ = 1562540544. Its totient is φ = 1515499440.

The previous prime is 1538993933. The next prime is 1538993983. The reversal of 1538993941 is 1493998351.

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 1538993941 - 2³ = 1538993933 is a prime.

It is a super-2 number, since 2×1538993941² = 4737004700869422962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538993041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48715 + ... + 73831.

It is an arithmetic number, because the mean of its divisors is an integer number (195317568).

Almost surely, 2^1538993941 is an apocalyptic number.

It is an amenable number.

1538993941 is a deficient number, since it is larger than the sum of its proper divisors (23546603).

1538993941 is an equidigital number, since it uses as much as digits as its factorization.

1538993941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26051.

The product of its digits is 1049760, while the sum is 52.

The square root of 1538993941 is about 39230.0132679050. The cubic root of 1538993941 is about 1154.5488242369.

The spelling of 1538993941 in words is "one billion, five hundred thirty-eight million, nine hundred ninety-three thousand, nine hundred forty-one".