97873639 has 4 divisors (see below), whose sum is σ = 97943560. Its totient is φ = 97803720.

The previous prime is 97873627. The next prime is 97873661. The reversal of 97873639 is 93637879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93637879 = 89 ⋅1052111.

It is a cyclic number.

It is not a de Polignac number, because 97873639 - 2⁷ = 97873511 is a prime.

It is a super-2 number, since 2×97873639² = 19158498422204642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97873739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32817 + ... + 35674.

It is an arithmetic number, because the mean of its divisors is an integer number (24485890).

Almost surely, 2^97873639 is an apocalyptic number.

97873639 is a deficient number, since it is larger than the sum of its proper divisors (69921).

97873639 is a wasteful number, since it uses less digits than its factorization.

97873639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69920.

The product of its digits is 1714608, while the sum is 52.

The square root of 97873639 is about 9893.1106837031. The cubic root of 97873639 is about 460.8453877392.

The spelling of 97873639 in words is "ninety-seven million, eight hundred seventy-three thousand, six hundred thirty-nine".