70198819 has 2 divisors, whose sum is σ = 70198820. Its totient is φ = 70198818.

The previous prime is 70198813. The next prime is 70198823. The reversal of 70198819 is 91889107.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70198819 - 2²¹ = 68101667 is a prime.

It is a super-2 number, since 2×70198819² = 9855748377989522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70198813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35099409 + 35099410.

It is an arithmetic number, because the mean of its divisors is an integer number (35099410).

Almost surely, 2^70198819 is an apocalyptic number.

70198819 is a deficient number, since it is larger than the sum of its proper divisors (1).

70198819 is an equidigital number, since it uses as much as digits as its factorization.

70198819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 70198819 is about 8378.4735483261. The cubic root of 70198819 is about 412.5183467812.

It can be divided in two parts, 70198 and 819, that added together give a palindrome (71017).

The spelling of 70198819 in words is "seventy million, one hundred ninety-eight thousand, eight hundred nineteen".