70725519 has 24 divisors (see below), whose sum is σ = 106226640. Its totient is φ = 45290112.

The previous prime is 70725509. The next prime is 70725521. The reversal of 70725519 is 91552707.

70725519 is a `hidden beast` number, since 70 + 72 + 5 + 519 = 666.

It is not a de Polignac number, because 70725519 - 2⁴ = 70725503 is a prime.

It is a super-2 number, since 2×70725519² = 10004198075638722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70725509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60232 + ... + 61394.

It is an arithmetic number, because the mean of its divisors is an integer number (4426110).

Almost surely, 2^70725519 is an apocalyptic number.

70725519 is a deficient number, since it is larger than the sum of its proper divisors (35501121).

70725519 is a wasteful number, since it uses less digits than its factorization.

70725519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 70725519 is about 8409.8465503242. The cubic root of 70725519 is about 413.5474821765.

The spelling of 70725519 in words is "seventy million, seven hundred twenty-five thousand, five hundred nineteen".