38121761 has 4 divisors (see below), whose sum is σ = 38342292. Its totient is φ = 37901232.

The previous prime is 38121749. The next prime is 38121773. The reversal of 38121761 is 16712183.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (38121749) and next prime (38121773).

It can be written as a sum of positive squares in 2 ways, for example, as 27363361 + 10758400 = 5231^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 38121761 - 2⁶ = 38121697 is a prime.

It is a super-2 number, since 2×38121761² = 2906537323482242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38121781) 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, 110006 + ... + 110351.

It is an arithmetic number, because the mean of its divisors is an integer number (9585573).

Almost surely, 2^38121761 is an apocalyptic number.

It is an amenable number.

38121761 is a deficient number, since it is larger than the sum of its proper divisors (220531).

38121761 is a wasteful number, since it uses less digits than its factorization.

38121761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220530.

The product of its digits is 2016, while the sum is 29.

The square root of 38121761 is about 6174.2822254899. The cubic root of 38121761 is about 336.5562433449.

The spelling of 38121761 in words is "thirty-eight million, one hundred twenty-one thousand, seven hundred sixty-one".