97421539 has 2 divisors, whose sum is σ = 97421540. Its totient is φ = 97421538.

The previous prime is 97421507. The next prime is 97421557. The reversal of 97421539 is 93512479.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97421539 - 2⁵ = 97421507 is a prime.

It is a super-2 number, since 2×97421539² = 18981912522257042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97421239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48710769 + 48710770.

It is an arithmetic number, because the mean of its divisors is an integer number (48710770).

Almost surely, 2^97421539 is an apocalyptic number.

97421539 is a deficient number, since it is larger than the sum of its proper divisors (1).

97421539 is an equidigital number, since it uses as much as digits as its factorization.

97421539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 97421539 is about 9870.2350022682. The cubic root of 97421539 is about 460.1347100740.

The spelling of 97421539 in words is "ninety-seven million, four hundred twenty-one thousand, five hundred thirty-nine".