70399525 has 36 divisors (see below), whose sum is σ = 102733380. Its totient is φ = 47712000.

The previous prime is 70399487. The next prime is 70399591. The reversal of 70399525 is 52599307.

70399525 = 1162² + 1163² + ... + 1211².

It can be written as a sum of positive squares in 6 ways, for example, as 74529 + 70324996 = 273^2 + 8386^2 .

It is not a de Polignac number, because 70399525 - 2¹⁷ = 70268453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123441 + ... + 124009.

It is an arithmetic number, because the mean of its divisors is an integer number (2853705).

Almost surely, 2^70399525 is an apocalyptic number.

It is an amenable number.

70399525 is a deficient number, since it is larger than the sum of its proper divisors (32333855).

70399525 is a wasteful number, since it uses less digits than its factorization.

70399525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 70399525 is about 8390.4424793928. The cubic root of 70399525 is about 412.9111175194.

The spelling of 70399525 in words is "seventy million, three hundred ninety-nine thousand, five hundred twenty-five".