97870511 has 2 divisors, whose sum is σ = 97870512. Its totient is φ = 97870510.

The previous prime is 97870477. The next prime is 97870519. The reversal of 97870511 is 11507879.

It is a strong prime.

It is an emirp because it is prime and its reverse (11507879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97870511 - 2¹⁰ = 97869487 is a prime.

It is a super-2 number, since 2×97870511² = 19157273846802242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97870519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48935255 + 48935256.

It is an arithmetic number, because the mean of its divisors is an integer number (48935256).

Almost surely, 2^97870511 is an apocalyptic number.

97870511 is a deficient number, since it is larger than the sum of its proper divisors (1).

97870511 is an equidigital number, since it uses as much as digits as its factorization.

97870511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 97870511 is about 9892.9525926288. The cubic root of 97870511 is about 460.8404782125.

The spelling of 97870511 in words is "ninety-seven million, eight hundred seventy thousand, five hundred eleven".