51670699 has 2 divisors, whose sum is σ = 51670700. Its totient is φ = 51670698.

The previous prime is 51670693. The next prime is 51670753. The reversal of 51670699 is 99607615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51670699 - 2¹⁵ = 51637931 is a prime.

It is a super-2 number, since 2×51670699² = 5339722270297202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51670693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25835349 + 25835350.

It is an arithmetic number, because the mean of its divisors is an integer number (25835350).

Almost surely, 2^51670699 is an apocalyptic number.

51670699 is a deficient number, since it is larger than the sum of its proper divisors (1).

51670699 is an equidigital number, since it uses as much as digits as its factorization.

51670699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 51670699 is about 7188.2333712812. The cubic root of 51670699 is about 372.4615494146.

The spelling of 51670699 in words is "fifty-one million, six hundred seventy thousand, six hundred ninety-nine".