69406381 has 4 divisors (see below), whose sum is σ = 75716064. Its totient is φ = 63096700.

The previous prime is 69406333. The next prime is 69406391. The reversal of 69406381 is 18360496.

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 a de Polignac number, because none of the positive numbers 2^k-69406381 is a prime.

It is a super-2 number, since 2×69406381² = 9634491447034322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69406381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69406301) 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, 3154825 + ... + 3154846.

It is an arithmetic number, because the mean of its divisors is an integer number (18929016).

Almost surely, 2^69406381 is an apocalyptic number.

It is an amenable number.

69406381 is a deficient number, since it is larger than the sum of its proper divisors (6309683).

69406381 is a wasteful number, since it uses less digits than its factorization.

69406381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6309682.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 69406381 is about 8331.0492136345. The cubic root of 69406381 is about 410.9602339758.

The spelling of 69406381 in words is "sixty-nine million, four hundred six thousand, three hundred eighty-one".