697944381 has 8 divisors (see below), whose sum is σ = 942372480. Its totient is φ = 459406272.

The previous prime is 697944343. The next prime is 697944383. The reversal of 697944381 is 183449796.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 697944381 - 2¹³ = 697936189 is a prime.

It is a super-2 number, since 2×697944381² = 974252717938946322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697944383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1472220 + ... + 1472693.

It is an arithmetic number, because the mean of its divisors is an integer number (117796560).

Almost surely, 2^697944381 is an apocalyptic number.

It is an amenable number.

697944381 is a deficient number, since it is larger than the sum of its proper divisors (244428099).

697944381 is a wasteful number, since it uses less digits than its factorization.

697944381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944995.

The product of its digits is 1306368, while the sum is 51.

The square root of 697944381 is about 26418.6370011778. The cubic root of 697944381 is about 887.0340103732.

It can be divided in two parts, 6979 and 44381, that added together give a triangular number (51360 = T₃₂₀).

The spelling of 697944381 in words is "six hundred ninety-seven million, nine hundred forty-four thousand, three hundred eighty-one".