97011491 has 2 divisors, whose sum is σ = 97011492. Its totient is φ = 97011490.

The previous prime is 97011487. The next prime is 97011553. The reversal of 97011491 is 19411079.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19411079) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97011491 - 2² = 97011487 is a prime.

It is a super-2 number, since 2×97011491² = 18822458772086162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97011461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48505745 + 48505746.

It is an arithmetic number, because the mean of its divisors is an integer number (48505746).

Almost surely, 2^97011491 is an apocalyptic number.

97011491 is a deficient number, since it is larger than the sum of its proper divisors (1).

97011491 is an equidigital number, since it uses as much as digits as its factorization.

97011491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 97011491 is about 9849.4411516593. The cubic root of 97011491 is about 459.4882320466.

The spelling of 97011491 in words is "ninety-seven million, eleven thousand, four hundred ninety-one".