69491377 has 2 divisors, whose sum is σ = 69491378. Its totient is φ = 69491376.

The previous prime is 69491371. The next prime is 69491381. The reversal of 69491377 is 77319496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62710561 + 6780816 = 7919^2 + 2604^2 .

It is a cyclic number.

It is not a de Polignac number, because 69491377 - 2³ = 69491369 is a prime.

It is a super-2 number, since 2×69491377² = 9658102954712258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (69491371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34745688 + 34745689.

It is an arithmetic number, because the mean of its divisors is an integer number (34745689).

Almost surely, 2^69491377 is an apocalyptic number.

It is an amenable number.

69491377 is a deficient number, since it is larger than the sum of its proper divisors (1).

69491377 is an equidigital number, since it uses as much as digits as its factorization.

69491377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 46.

The square root of 69491377 is about 8336.1488110518. The cubic root of 69491377 is about 411.1279213779.

The spelling of 69491377 in words is "sixty-nine million, four hundred ninety-one thousand, three hundred seventy-seven".