64429091 has 2 divisors, whose sum is σ = 64429092. Its totient is φ = 64429090.

The previous prime is 64429033. The next prime is 64429103. The reversal of 64429091 is 19092446.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64429091 is a prime.

It is a super-2 number, since 2×64429091² = 8302215534172562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64429891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32214545 + 32214546.

It is an arithmetic number, because the mean of its divisors is an integer number (32214546).

Almost surely, 2^64429091 is an apocalyptic number.

64429091 is a deficient number, since it is larger than the sum of its proper divisors (1).

64429091 is an equidigital number, since it uses as much as digits as its factorization.

64429091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 64429091 is about 8026.7733866106. The cubic root of 64429091 is about 400.8919491717.

The spelling of 64429091 in words is "sixty-four million, four hundred twenty-nine thousand, ninety-one".