97429729 has 4 divisors (see below), whose sum is σ = 97521940. Its totient is φ = 97337520.

The previous prime is 97429711. The next prime is 97429747. The reversal of 97429729 is 92792479.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (97429711) and next prime (97429747).

It can be written as a sum of positive squares in 2 ways, for example, as 26061025 + 71368704 = 5105^2 + 8448^2 .

It is a cyclic number.

It is not a de Polignac number, because 97429729 - 2¹⁷ = 97298657 is a prime.

It is a super-3 number, since 3×97429729³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97429429) 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, 44502 + ... + 46639.

It is an arithmetic number, because the mean of its divisors is an integer number (24380485).

Almost surely, 2^97429729 is an apocalyptic number.

It is an amenable number.

97429729 is a deficient number, since it is larger than the sum of its proper divisors (92211).

97429729 is a wasteful number, since it uses less digits than its factorization.

97429729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92210.

The product of its digits is 571536, while the sum is 49.

The square root of 97429729 is about 9870.6498772877. The cubic root of 97429729 is about 460.1476038608.

It can be divided in two parts, 974 and 29729, that added together give a palindrome (30703).

The spelling of 97429729 in words is "ninety-seven million, four hundred twenty-nine thousand, seven hundred twenty-nine".