70687025 has 6 divisors (see below), whose sum is σ = 87651942. Its totient is φ = 56549600.

The previous prime is 70687021. The next prime is 70687051. The reversal of 70687025 is 52078607.

It can be written as a sum of positive squares in 3 ways, for example, as 110224 + 70576801 = 332^2 + 8401^2 .

It is not a de Polignac number, because 70687025 - 2² = 70687021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70687021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1413716 + ... + 1413765.

It is an arithmetic number, because the mean of its divisors is an integer number (14608657).

Almost surely, 2^70687025 is an apocalyptic number.

It is an amenable number.

70687025 is a deficient number, since it is larger than the sum of its proper divisors (16964917).

70687025 is a wasteful number, since it uses less digits than its factorization.

70687025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827491 (or 2827486 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 70687025 is about 8407.5576120536. The cubic root of 70687025 is about 413.4724409656.

The spelling of 70687025 in words is "seventy million, six hundred eighty-seven thousand, twenty-five".